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Numerical Simulation of Dilute Phase Transportation in Pulse Riser

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China Petroleum Processing & Petrochemical Technology 2021年第4期23卷 130-140页

作者： An Xiaoxi Yang Ze qiao yingyun Tian Yuanyu Key Laboratory of Low Carbon Energy and Chemical Engineering Shandong University of Science and TechnologyQingdao 266590 State Key Laboratory of Heavy Oil Processing China University of PetroleumQingdao 266580

To study the hydrodynamic characteristics of gas-solid-phase flow in a pulse riser,a dense discrete particle model considering particle collisions and solid volume fraction is used.The core-annular flow in the enlarged-diameter section of the pulse riser is described,which can be destroyed with a high superficial gas velocity.The particle trajectory crossing effect and particle-particle and particle-wall collisions in the reduced-diameter section of the pulse riser can also destroy the core-annular flow and enhance the gas-solid interaction.The solid volume fraction exhibits an S-type distribution at different solid mass rates.The distribution of axial velocity,radial velocity,and relative slip velocity is investigated by analyzing the simulated results at different pulse riser diameter ratios.A suitable pulse riser diameter ratio can improve the performance of the pulse riser.

关键词： numerical simulation fluidized bed entrained flow bed pyrolysis-gasification

Effect of Structural Parameters on the Performance of NS High-efficiency Composite TraysⅠ.The Effect of Aperture and Opening Ratio on NS High-efficiency Composite Trays

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China Petroleum Processing & Petrochemical Technology 2009年第3期11卷 56-61页

作者： qiao yingyun Tian Yuanyu Xu Jingfang Xie Kechang Shandong University of Science and Technology Taiyuan University of Technology

In this paper,the structure and characteristics of the NS high-efficiency composite trays based on the doublelayer aperture jet sieve plate and compositely structured packing were investigated.The effect of aperture and opening ratio of plate on the fluid dynamics of the NS high-efficiency composite trays,such as the dry tray pressure drop,the wet tray pressure drop,the entrainment,the froth height,the leakage and mass transfer characteristics,were investigated.As a result, the low pressure drop,the high efficiency and the high capacity are the main advantages of the NS high-efficiency composite trays compared to other types of trays.According to this study,small aperture is useful for reducing the pressure drop and entrainment with a high mass transfer efficiency;while large aperture can achieve high capacity and efficiency in a broader operating range at the same pressure drop and entrainment.

关键词：结构参数托盘 NS 复合光圈性能流体动力学低压降

Structure Optimization of a Horizontal Gas-Solid Rapid Separation Device

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China Petroleum Processing & Petrochemical Technology 2020年第1期22卷 69-77页

作者： An Xiaoxi Fan Junfeng Tian Yuanyu qiao yingyun Zong Peijie Shandong University of Science and Technology Qingdao 266510 China University of Petroleum(Huadong) Qingdao 266555

To meet the requirements for fast and efficient gas-solid separation at the outlet of a gas-solid concurrent downflow fluidized bed(downer),a new horizontal gas-solid rapid separator was designed based on the joint action of centrifugal and inertial forces.Under the same experimental conditions,a fluid catalytic cracking(FCC)catalyst was used as the material(with a particle density of 1500 kg/m3 and a mean particle size of 45.8μm)to experimentally investigate the effects of the insertion length of gas outlet pipe,the bypass cylinder,the gas outlet direction,and the secondary separation structure on the separator performance.The results showed that with an inlet gas flow rate of 14.5 m/s and a gas phase solid content of 60―835 g/m3,the downer system achieved a gas-solid separation efficiency of above 99.5%,with the separator’s pressure drop within 1846 Pa(when the separator included a bypass cylinder and a secondary separation structure with a proper insertion length of gas outlet pipe).

关键词： gas-solid separator bypass cylinder separation efficiency pressure drop

Behavior and Kinetics of Non-isothermal Pyrolysis of Coal at Different Heating Rates

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China Petroleum Processing & Petrochemical Technology 2017年第3期19卷 89-96页

作者： Fan Junfeng Tian Bin An Xiaoxi Yin Mengmeng qiao yingyun Tian Yuanyu Key Laboratory of Low Carbon Energy and Chemical Engineering Shandong University of Science and Technology State Key Laboratory of Heavy Oil Processing China University of Petroleum

Investigations on the pyrolysis and kinetic behaviors during pyrolysis of fossil fuel samples, such as coal, are fundamental for developing the related technology and practical application. In this work, pyrolysis behavior and kinetics in the pyrolysis process of a coal sample were investigated by the thermogravimetric analyzer at a heating rate of 10, 40, 70,100, 200, and 500 °C/min, respectively. The pyrolysis process could be divided into four stages according to the TG/DTG curves. The first stage was mainly attributed to the removal of volatiles, and the second peak was the polycondensation reaction between the volatile components. It was found that more volatiles could be released from coal during pyrolysis at higher heating rate and the higher pyrolysis temperature was necessary for a rapid pyrolysis process. Kinetic analysis revealed that both the model-free(KAS and FWO) and the Coats-Redfern methods were suitable to describing the pyrolysis process, and the variation of activation energy(E) with the two types of kinetic models was consistent during the whole pyrolysis process. Furthermore, the heating rate did not alter the reaction sequence of the whole pyrolysis process, but higher heating rate could make the E value of the initial pyrolysis stage smaller.

关键词： pyrolysis behavior kinetic analysis TG/DTG curves activation energy

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碳中和约束下绿色减排体系的构建

化工进展 2022年第2期41卷 1078-1084页

作者：田原宇乔英云张永宁中国石油大学(华东)化学工程学院山东青岛266580

基于对CO_(2)具有“既是亟待减排的温室气体,又是人类生存必不可少的可再生资源”双重性的认知,本文首次提出了碳中和约束下的“污染温室因子禁排、CO_(2)净零排放、调控CH_(4)产生和排放”的温室因子绿色减排体系。文中从两个方面提出... 详细信息

基于对CO_(2)具有“既是亟待减排的温室气体,又是人类生存必不可少的可再生资源”双重性的认知,本文首次提出了碳中和约束下的“污染温室因子禁排、CO_(2)净零排放、调控CH_(4)产生和排放”的温室因子绿色减排体系。文中从两个方面提出绿色减排体系的构建:在国家层面,通过制定相关减排政策体系、进行国家超级工程和行动,为我国实现“30·60双碳目标”提供依据、标准和规范,形成实施绿色碳减排的基石和支撑体系;在微观技术层面,通过全过程控碳排放的CO_(2)绿色减排技术,包括源头上避免高碳排放、过程中控制碳排放、末端强化碳循环与捕集利用(3CU)等。最后指出,依靠能源绿色低碳转型,以节能降耗和生物固碳为抓手,疏堵结合,满足自然界的碳循环平衡需求,高效低成本实现经济社会高质量低碳化发展、生态文明建设与应对气候变化的三赢,将会促进我国2030年前达到峰值和2060年前实现碳中和。

关键词：碳中和温室因子绿色减排体系降污减碳 CO_(2)绿色减排全过程控碳排放碳循环与捕集利用二氧化碳捕集

含有典型C—C煤炭模型化合物热解过程的自由基调控机理研究

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煤炭转化 2023年第5期46卷 12-20页

作者：崔若彤陈曦乔英云田原宇中国石油大学(华东)重质油国家重点实验室山东青岛266580

煤本身是一种复杂的非均质混合物,含有大量的致密环状芳香烃。针对煤结构中各种C—C化学键,采用联苄、二苯甲烷、联苯作为煤C—C结构的模型化合物,分别在600℃,650℃,700℃,750℃下通过Py-GC/MS探究其热解产物分布情况;通过添加供氢溶剂... 详细信息

煤本身是一种复杂的非均质混合物,含有大量的致密环状芳香烃。针对煤结构中各种C—C化学键,采用联苄、二苯甲烷、联苯作为煤C—C结构的模型化合物,分别在600℃,650℃,700℃,750℃下通过Py-GC/MS探究其热解产物分布情况;通过添加供氢溶剂(hydrogen donor solvent,HDS)捕获中间自由基验证其反应路径的存在;利用Gaussian09,Shermo,选取M06-2X泛函、def2-TZVP基组,加上D03(0)色散校正计算化学键解离焓(BDE)。通过实验与模拟相结合的方式印证自由基路径的存在。同时,用Py-GC/MS进行不同温度的模型化合物的热解实验。结果表明:模型化合物的热解均为自由基路径;由于C—C键类型不同,模型化合物的热解程度不同。各个键按能垒由大到小排序依次为C_(ar)—C_(ar),C_(ar)—C_(al),C_(al)—C_(al),因此,热解程度由大到小的化合物依次为联苄、二苯甲烷、联苯。供氢溶剂可能会降低断键能垒;模型化合物热解中间自由基如苯基自由基和苯甲基自由基等可以被供氢溶剂提供的氢自由基稳定;温度不同,断键比率发生变化,说明产生自由基比率发生改变。在700℃和750℃下,联苄两条反应路径的断链速率比分别为4.783×10^(8)和1.503×10^(8),证明温度会改变化学键的断键速率,但不改变主要热解路径。

关键词：模型化合物热解机理自由基 C—C键煤

石油热解过程中自由基调控反应机理的构建与应用

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化工进展 2021年第5期40卷 2928-2932页

作者：田原宇乔英云中国石油大学(华东)重质油国家重点实验室山东青岛266580

石油热解是生产高品质气液燃料和化学品的重要步骤,不仅涉及非催化过程,也涉及催化过程。石油热解过程反应机理不仅为解析不同类型的热解反应过程、构建反应动力学模型以及定向调控和强化,而且对于工艺条件优化、反应调控和强化、催化... 详细信息

石油热解是生产高品质气液燃料和化学品的重要步骤,不仅涉及非催化过程,也涉及催化过程。石油热解过程反应机理不仅为解析不同类型的热解反应过程、构建反应动力学模型以及定向调控和强化,而且对于工艺条件优化、反应调控和强化、催化剂开发和优化以及反应装备技术开发和强化等均能指明方向和提供依据,但现有热裂解自由基链式反应机理和催化裂化正碳离子反应机理均存在实验现象尚未能合理解释。本文提出了石油热解过程的化学反应主体均由受热离解的自由基主导的观点,创建了石油热解过程自由基调控反应机理,不同热解工艺区别主要在于二次自由基调控,自由基复合产物以及稳定产物形成了特定热解过程的产物分布。按照初始自由基产生、二次自由基调控和自由基复合3个阶段的反应机理,合理解析石油催化裂化过程各种应用现象,有效指导了劣质重油快速催化热解-气化耦合技术和原油直接分级气相毫秒催化裂解制化学品技术的开发,证实了石油热解过程自由基调控反应机理的普适性,为工艺条件优化、反应调控和强化、催化剂优化提升和反应装备技术强化等均能指明方向和提供依据。

关键词：石油热解自由基调控反应机理普适性

Structural Optimization of a Novel Up-run Gas-solid Separator

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China Petroleum Processing & Petrochemical Technology 2011年第2期13卷 36-42页

作者： Gai Xikun1 Tian Yuanyu2 Xia Daohong1 qiao yingyun2(1.China University of Petroleum(East China),Qingdao 266555 2.Shandong University of Science and Technology,Qingdao 266510) China University of Petroleum (East China) Qingdao 266555 China Shandong University of Science and Technology Qingdao 266510 China

A new gas-solid separator dedicated to heavy-oil fast pyrolysis process incorporating inertial and centrifugal separation was designed.Gas and typical fluid catalytic cracking(FCC) catalyst particles(with a density of 1500 kg/m3,and a mean diameter of 45.81 μm) were used in the study.The inlet gas velocity was kept constant at 13.36 m/s,while the solid loading at the inlet ranged from 0 to 700 g/m3.When the exhaust pipe opening was provided with two narrow-width slots near the inlet without baffles,the solid collection efficiency increased with an increasing solid loading at the inlet and was close to 95% along with a decreasing pressure drop.After increasing the secondary separation structure,the separation efficiency greatly improved.By adjusting the diameter of the secondary exhaust pipe,the separation efficiency and pressure drop could be balanced.Under the experimental conditions,when the diameter of the second exhaust pipe was equal to d=100 mm,the pressure drop was lower than 1400 Pa while the separation efficiency could exceed 99.50%;and when the diameter was equal to d=120 mm,the pressure drop was less than 700 Pa,with the separation efficiency reaching over 99.00%.

关键词：气固分离器结构优化平均直径分离效率运行催化剂颗粒排气管裂解过程

减压深拔技术集成与调控Ⅰ.减压深拔设备技术集成

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石油炼制与化工 2013年第10期44卷 32-37页

作者：田原宇乔英云中国石油大学(华东)重质油国家重点实验室山东青岛266580 山东省高校低碳能源化工重点实验室(山东科技大学)

重劣质油大量生产、常压渣油难以直接作为重油催化裂化原料,减压深拔技术重要性凸显。从常减压蒸馏装置整体考虑,统筹优化,将NS导向提馏塔板、NS减压进料分布器、NS洗涤段专用格栅填料、NS复合穿流塔板、NS抗堵喷射型液体分布器、NS层... 详细信息

重劣质油大量生产、常压渣油难以直接作为重油催化裂化原料,减压深拔技术重要性凸显。从常减压蒸馏装置整体考虑,统筹优化,将NS导向提馏塔板、NS减压进料分布器、NS洗涤段专用格栅填料、NS复合穿流塔板、NS抗堵喷射型液体分布器、NS层塔式液体收集器以及直接接触传热技术的配套设备等硬件技术集成,通过提高常压塔拔出率、改善减压塔闪蒸段分离效果、减少雾沫夹带,提高减压塔闪蒸真空度和闪蒸段温度、减少闪蒸段内回流、减压塔底微湿式汽提、提高切割清晰度等措施,从常减压装置设备方面提供了达到低成本、低能耗减压深拔效果的技术支撑。

关键词：减压深拔塔内件集成真空度拔出率