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Analysis and calculation model of energy consumption and product yields of delayed coking units

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Petroleum Science 2012年第1期9卷 100-105页

作者： Ren Jingdong Meng Xianghai Xu Chunming Song Zhaozheng JiangQingzhe Liu Zhefu State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China

delayed coking is an important process consumption and light oil yield are important factors used to convert heavy oils to light products. Energy for evaluating the delayed coking process. This paper analyzes the energy consumption and product yields of delayed coking units in China. The average energy consumption shows a decreasing trend in recent years. The energy consumption of different refineries varies greatly, with the average value of the highest energy consumption approximately twice that of the lowest energy consumption. The factors affecting both energy consumption and product yields were analyzed, and correlation models of energy consumption and product yields were established using a quadratic polynomial. The model coefficients were calculated through least square regression of collected industrial data of delayed coking units. Both models showed good calculation accuracy. The average absolute error of the energy consumption model was approximately 85 MJ/t, and that of the product yield model ranged from 1 wt% to 2.3 wt%. The model prediction showed that a large annual processing capacity and high load rate will result in a reduction in energy consumption.

关键词： delayed coking energy consumption product yield model

Co-processing Vacuum Residue with Waste Plastics in a delayed coking Process:Kinetics and Modeling

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China Petroleum Processing & Petrochemical Technology 2012年第3期14卷 44-49页

作者： Mominou Nchare Shen Benxian Solomon G.Anagho School of Geology Mining and Minerals Processing(E.G.E.M de Meiganga)University of NgaoundereP.O.Box 454 NgaoundereRepublic of Cameroon Petroleum Processing Research Center East China University of Science and Technology Department of Chemistry Faculty of ScienceUniversity of DschangDschangRepublic of Cameroon

Thermal upgrading of vacuum residue mixed with waste plastics was studied in a laboratory scale delayed coking *** model of feed thermal decomposition was set up and the first order reaction kinetics was used to predict products distribution during the coking *** distillate yield was higher(70%) for the vacuum residue/polystyrene(VR/PS) feed system and the vacuum residue/low density polyethylene(VR/LDPE) feed *** resulted distillate yield was separated into fractions according to their boiling points,with gasoline and diesel being our fractions of *** activation energy was higher for gasoline production(around 60 kcal/mol) varying with the type of feed system,while it was 33 kcal/mol for diesel *** regression coefficient R was 0.990.

关键词： delayed coking waste plastics vacuum residue kinetics

Increasing Liquid Yield and Diesel Fraction in delayed coking Process: Mechanism of Liquid Formation

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China Petroleum Processing & Petrochemical Technology 2007年第3期9卷 23-27页

作者： Mominou Nchare East China University of Science and Technology Petroleum Processing Reach InstituteShanghai 200237

The thermal upgrading of two residual oils tory-scale continuous delayed coking unit. The goal with different characteristics was studied in a labora- was to investigate the influence of the process vari- ables such as temperature, reaction time and additive on liquid yield and products distribution. A maximum liquid yield of 73% was achieved compared to 69% with the commercial unit. This yield was even increased to 75% under the effect of an additive. The fractionation of liquid oil by simulated vacuum distillation showed a high yield of diesel （46.9%）, compared to 28% for the commercial unit.

关键词： delayed coking liquid yield products distribution

Technical Progress of China's delayed coking Technology

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China Petroleum Processing & Petrochemical Technology 2005年第4期7卷 1-13页

作者： Zhang Lixin Li Hejie SINOPEC Luoyang Petrochemical Engineering Company Luoyang 471003

This article introduces the recent advances of China in the fields of process technology of delayed coking, enlarged equipment size, hydraulic decoking, automatic control and environmental protection. By the end of 2004 the total capacity of delayed coking uniis in China had reached 37.24 Mt/a with the maximum coke drum diameter equating to 9.4 m. This article also presents the investmerit in delayed cokers and the current production status while pointing out the existing problems and future development trends.

关键词： delayed coking technical progress enlarged size review

The New-Generation Technology for Making Petroleum Needle Coke

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China Petroleum Processing & Petrochemical Technology 2003年第3期5卷 23-27页

作者： SiftChangzhi ShenHaiping LongJun XieChangjiang ResearchInstituteofPetroleumProcessing Beijing100083 HaihuaGroupCompany Weifang261000

The current technology for producing the petroleum needle coke is apt to cause overflow of feedstock from the coke drums, instability in operation of coking unit, low mechanical strength of petroleum coke, and high percentage of coke powder, leading to difficulties in improving the overall quality of needle coke. Therefore, we have developed a new technology for producing the needle coke,featuring the manipulation of temperature range in a narrow scale at high pressure coupled with feedstock alternations. This new kind of technology has been successfully applied in a 60kt/a commercial coking unit. Provided that demand for the feedstock quality is satisfied, petroleum needle coke meeting the international quality standard can be manufactured using RIPP's technology for producing petroleum needle coke.

关键词： needle coke delayed coking operating pressure varying temperature

A Novel Strategy for Simulating the Main Fractionator of delayed Cokers by Separating the De-superheating Process

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Chinese Journal of Chemical Engineering 2013年第3期21卷 285-294页

作者：雷杨张冰剑侯小琼陈清林 School of Chemistry and Chemical Engineering Key Lab of Low-carbon Chemistry & Energy Conservation ofGuangdong Province Sun Yat-Sen University Guangzhou 510275 China

delayed coking is an important process in refinery to convert heavy residue oils from crude distillation units （CDUs） and fluid catalytic cracking units （FCCUs） into dry gas, liquefied petroleum gas （LPG）, gasoline, die- sel, gas oils and cokes. The main fractionator, separating superheating reaction vapors from the coke drums into lighter oil products, involves a de-superheating section and a rectifying section, and couldn＇t be simulated as a whole column directly because of non-eouilibrium in the de-suoerheatine section. It is verv imoortant to correctlv simulate the main fractionator for operational parameter and energy-use optimization of delayed cokers. This paper discusses the principle of de-superheating processes, and then proposes a new simulation strategy. Some key issues such as composition prediction of the reaction vapors, selection of thermodynamic methods, estimation of tray efficiency, etc. are discussed. The proposed simulation approach is applied to two industrial delayed cokers with typical technological processes in a Chinese refinery by using PRO/II. The simulation results obtained are well consistent with the actual operation data, which indicates that the presented approach is suitable to simulate the main fraction- ators of delayed cokers or other distillation columns consisting of de-superheating sections and rectifying sections.

关键词： delayed coking de-superheating process fractionator simulation