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Particuology 2024年第8期91卷 235-248页

作者： Min Cai Shuangzhu Kong mengxi liu Chunxi Lu State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing102249China

Oxidative coupling of methane(OCM)is characterized by high temperature and strong heat released.A riser reactor is designed for the OCM process to improve gas-solid contacting and heat *** work illustrates the effect of hydrodynamic conditions and feed gas composition on the performance of an OCM riser *** findings suggest that oxidative reactions predominantly occur within the acceleration zone and developed flow ***,at the low superficial gas velocity accompanied by a high solid circulating rate,the C_(2)yield initially increases in the acceleration zone,followed by a decrease in the developed flow zone and deceleration *** optimal operating conditions are a specific region corresponding to the solids holdup ranges from 0.015 to ***,the C_(2)yield can be elevated using an appropriate feed mixture.

关键词： Oxidative coupling of methane Riser Hydrodynamics Solids holdup

Hydrodynamics and OCM reaction performance in a bubbling fluidized bed reactor and a riser reactor

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Particuology 2024年第3期86卷 188-204页

作者： Min Cai Shuangzhu Kong Sheng Chen mengxi liu Chunxi Lu State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing102249China China Special Equipment Inspection and Research Institute Beijing102249China

The reasonable reactor design is of great importance for increasing the C_(2) yield(C2H4 and C2H6)of the oxidative coupling of methane(OCM),and the OCM reactor should remove the heat released in reactions quickly and efficiently and minimize the consecutive reaction of ethylene to carbon *** fluidized bed reactor is characterized by excellent heat transfer,superior mass transport,and large handling capacity,while fewer studies focused on large-scale fluidized bed reactors for the OCM ***,large cold-model experiments and computational fluid dynamics simulations were conducted to investigate hydrodynamics and the OCM reaction performance in a large-scale bubbling fluidized bed(BFB)and a large-scale *** the BFB reactor,consecutive reactions of ethylene are acute because of the strong gas back-mixing,high solids holdup,and non-uniform solids *** the consecutive reactions of ethylene are negligible due to the plug flow structure and low solids holdup in the riser ***,both reactors can achieve isothermal operation for the OCM *** C_(2) selectivity of 45.4% and C_(2) yield of 21.1% are obtained in the riser reactor,increasing by 20.3% and 5.8% individually than that in the BFB *** study provides useful information and reference to the OCM reactor designandcommercialization.

关键词： Oxidative coupling of methane Bubbling fluidized bed reactor Riser reactor Hydrodynamics Isothermal operation

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气固逆流式移动床过滤器的实验研究

高校化学工程学报 2024年第3期38卷 404-413页

作者：邢凯吕涵范怡平刘梦溪卢春喜中国石油大学(北京)机械与储运工程学院北京102249 中国石油大学(北京)化学工程与环境学院北京102249

为探究操作条件对气固逆流式移动床过滤器过滤性能的影响,通过大型冷模实验,考察了气固逆流式移动床过滤器的捕集颗粒循环强度、入口粉尘浓度、表观气速及入口粉尘粒径对装备性能的影响。实验结果表明,表观气速是影响床层压降的主要因素... 详细信息

为探究操作条件对气固逆流式移动床过滤器过滤性能的影响,通过大型冷模实验,考察了气固逆流式移动床过滤器的捕集颗粒循环强度、入口粉尘浓度、表观气速及入口粉尘粒径对装备性能的影响。实验结果表明,表观气速是影响床层压降的主要因素,表现出正相关的趋势。捕集颗粒循环强度、入口粉尘浓度、粉尘粒径的改变对床层压降影响较小。捕集颗粒循环强度和入口粉尘浓度的增加使压降增加。而粉尘粒径与床层压降间的关系随时间变化,开始时粉尘粒径与压降呈正相关,但当装置运行至平稳阶段则趋于降低。装备的除尘效率与入口粉尘浓度及颗粒循环强度正相关,与粉尘粒径及表观气速负相关。但粉尘粒径越小过滤效率越高的趋势受装置内滤饼的影响,仅在粉尘中位粒径10μm以上,且入口粉尘质量浓度在0~32 g·m^(-3)出现。移动床过滤器保持稳定床层压降的同时,具有较高的除尘效率。在颗粒循环强度0.3119 kg·s^(-1),16.5~32.7 g·m^(-3)入口粉尘浓度条件下,除尘效率可达99%;且对细微(13μm以下)粉尘的粒级效率接近99.9%。

关键词：移动床过滤两相流除尘效率压降

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论述企业管理的核心是人本主义

全国流通经济 2024年第4期 89-92页

作者：刘梦希对外经济贸易大学商学院北京100029

21世纪被认为是知识经济的时代,知识在社会经济发展中的作用逐步增强,其价值也越来越明显。当我们进入21世纪,由于消费理念和消费结构的变化,社会文化理念的改变在现代企业管理中的重要性日益显著。以人为本的人文主义,将人的需求放在首... 详细信息

21世纪被认为是知识经济的时代,知识在社会经济发展中的作用逐步增强,其价值也越来越明显。当我们进入21世纪,由于消费理念和消费结构的变化,社会文化理念的改变在现代企业管理中的重要性日益显著。以人为本的人文主义,将人的需求放在首位,企业通过这种方式来激发员工的积极性,进而创造一个和谐而团结的企业环境。人文关怀和人文管理的结合,也是企业民主管理必须认真考虑的关键因素,以此实现民主管理和企业管理的互相促进、互相支持。这种理念和方法是习近平新时代中国特色社会主义思想的具体化,全面贯彻党的二十大精神,坚持法律思维的企业管理模式,对于现代企业管理视野的创新,确立以人为本的企业管理理念具有深远的意义。企业管理的理念必须融合知识经济和人本管理,这是必定要走的路。

关键词：知识经济人本管理企业管理理念

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“敁敠”考辨

现代语文 2024年第6期 51-56页

作者：刘梦晰李灼吉林师范大学文学院吉林四平136000 吉林师范大学校长办公室吉林四平136000

综合运用文献学、文字学、训诂学等相关知识,对“敁敠”的本字、词义、书写形式进行考辨。它最早出自郭象《庄子注》,意思是“玷(拈)而捶(揣)之”。本字当作“拈揣”,后世更换形符及声符而形成“敁敠”,表示“用手称量”义,引申为“心... 详细信息

综合运用文献学、文字学、训诂学等相关知识,对“敁敠”的本字、词义、书写形式进行考辨。它最早出自郭象《庄子注》,意思是“玷(拈)而捶(揣)之”。本字当作“拈揣”,后世更换形符及声符而形成“敁敠”,表示“用手称量”义,引申为“心中斟酌、考虑”。由于其本义属手部行为而写作“敁掇”“敁挆”“拈敠”“拈掇”“掂掇”等;又因各地方言不同,形随音变,遂产生“点掇”“掂对”“掂兑”“掂夺”等写法。同时,“掂掇”等词语中的后字“掇/挆/对”,本有实义,并非词缀;“敁敠”也不是联绵词,而是并列式合成词。

关键词： “敁敠” “掂掇” 本字词形考辨

Flow hydrodynamics in a gas–solid fluidized bed reactor with two reaction zones

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Particuology 2019年第6期17卷 22-32页

作者： Shuaishuai Zhou Chunxi Lu mengxi liu State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China

A novel reactor with two reaction zones is proposed for pyridine *** flow hydrodynamics were investigated in *** taps and a PV-6D optical fiber were used to measure the pressure fluctuation and particle concentration,***–Huang analysis was adopted to distinguish the flow patterns through pressure *** show that the flow patterns are bubbling fluidization and fast fluidization in the regions below(reaction zone I)and above(reaction zone II)the nozzles,*** radial distribution of the cluster time fraction was obtained through signal waves of the particle *** of the cluster time fraction revealed two radial *** the region around the nozzles,the cluster time fraction ranged from 0 to 0.2 and concentrated at radial positions r/R=0–1,which resulted from unsymmetrical catalyst *** reaction zone II,the cluster time fraction ranged from 0 to 0.2,and the radial distribution indicated a core–annulus structure.

关键词： Two reaction zones Hilbert–Huang analysis Flow pattern Cluster time fraction

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碳四烷基化流出物制冷过程中多液滴蒸发特性

过程工程学报 2024年第6期24卷 660-669页

作者：韩旭张睿孟祥海郑涛刘海燕刘梦溪徐春明刘植昌中国石油大学(北京)重质油全国重点实验室北京102249

复合离子液体催化碳四烷基化是生产高品质清洁汽油调和组分的新技术,流出物制冷是维持其反应温度的重要过程。为了开发新的烷基化流出物制冷工艺,本工作研究了减压条件下异丁烷液滴的蒸发特性。将单个或多个异丁烷液滴悬浮在不同热电偶... 详细信息

复合离子液体催化碳四烷基化是生产高品质清洁汽油调和组分的新技术,流出物制冷是维持其反应温度的重要过程。为了开发新的烷基化流出物制冷工艺,本工作研究了减压条件下异丁烷液滴的蒸发特性。将单个或多个异丁烷液滴悬浮在不同热电偶上,测量液滴的温度变化,同时使用高速摄像机记录其蒸发过程,考察了最终压力、环境温度和液滴间距对液滴蒸发特性的影响。结果表明,多液滴和单液滴都包含剧烈蒸发阶段和稳定蒸发阶段。在稳定蒸发阶段,所有液滴都适用d2定律,边缘和中心液滴的蒸发速率均小于单液滴。随着最终压力增加和环境温度降低,中心液滴与单液滴的蒸发速率差异逐渐增大。当两液滴的间距增加到5.48d0时,液滴的蒸发速率逐渐接近单液滴。

关键词：碳四烷基化异丁烷液滴减压蒸发

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含风电并网的源荷双层机组优化组合模型

太阳能学报 2024年第3期45卷 399-407页

作者：李英量董志伟白博旭郭飞燕刘梦溪李飞西安石油大学电子工程学院西安710065

针对系统调峰能力不足,严重限制新能源的消纳问题,提出计及源荷两侧可调节资源的综合市场服务机制与需求响应的双层机组组合模型。上层对荷侧建立计及响应不确定性的以净负荷波动最小为目标函数的价格型需求响应模型;下层对源侧建立包... 详细信息

针对系统调峰能力不足,严重限制新能源的消纳问题,提出计及源荷两侧可调节资源的综合市场服务机制与需求响应的双层机组组合模型。上层对荷侧建立计及响应不确定性的以净负荷波动最小为目标函数的价格型需求响应模型;下层对源侧建立包含电力市场深度调峰辅助服务与碳市场奖惩阶梯式碳交易机制的综合市场交易机制,构建以综合运行成本最小为目标函数的机组组合模型;最后,将原问题转化为混合整数线性规划问题,通过设置不同场景验证该模型的有效性。

关键词：价格型需求响应深度调峰阶梯式碳交易机制响应不确定性风电消纳

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甲母质细胞癌1例

中华皮肤科杂志 2024年第2期57卷 165-167页

作者：丁高中刘梦茜马伟李姗姗孙澜陈朝潮南京医科大学附属苏州医院苏州市立医院东区皮肤科苏州215001 苏州大学附属传染病医院苏州市第五人民医院皮肤科苏州215001

报道1例甲母质细胞癌。患者女,76岁,左手拇指甲下肿物3年。皮肤科检查:左手拇指甲板增厚,局部呈黄色及黑色,远端甲板略弯曲,甲板下可见明显血管扩张,甲下及甲板外侧缘可见疣状增生。组织病理检查:肿瘤呈团块状向下浸润生长,团块中央明... 详细信息

报道1例甲母质细胞癌。患者女,76岁,左手拇指甲下肿物3年。皮肤科检查:左手拇指甲板增厚,局部呈黄色及黑色,远端甲板略弯曲,甲板下可见明显血管扩张,甲下及甲板外侧缘可见疣状增生。组织病理检查:肿瘤呈团块状向下浸润生长,团块中央明显角化坏死,伴较多“鳞状涡”结构及细胞异形,可见病理性核分裂象。免疫组化示HK31、HK85在鳞状涡区域阳性表达,K6/K16在肿瘤基底部阳性表达,HK75在整个肿瘤区域强阳性表达。诊断:甲母质细胞癌。治疗:手术切除联合3次皮肤光动力治疗,随访18个月未见复发。

关键词：肿瘤指(趾)甲甲母质细胞癌甲母质瘤甲母质细胞瘤

Characteristics of flow and liquid distribution in a gas-liquid vortex separator with multi spiral arms

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Particuology 2022年第9期20卷 101-113页

作者： Xiuying Yao Peng Zuo Chunxi Lu Chenglin E mengxi liu State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China Research Institute of Experimental and Detection Xinjiang Oilfield CompanyPetroChinaKaramayXinjiang 834000China

Fischer-Tropsch(F-T)synthesis is an important route to achieve the clean fuel *** perfor-mance of gas-liquid separation equipment involving in the progressive condensation and separation of light and heavy hydrocarbons in the oil-gas products has become a bottleneck restricting the smooth operation of the F-T *** order to remove the bottleneck,a gas-liquid vortex separator with simple structure,low pressure drop and big separation capacity was designed to achieve the efficient separation between gas and droplets for a long *** RSM(Reynolds Stress Model)and DPM(Discrete Phase Method)are employed to simulate the flow characteristics and liquid distribution in the *** results show that the separation efficiency is influenced by the flow field and liquid phase concentration in the annular *** transverse vortex at the top of spiral arm entrains the droplets with small diam-eter into the upper annular *** entrained droplets rotate upward at an angle of about 37.4°.The screw pitch between neighbor liquid threads is about 0.3 *** is a top liquid ring in the top of annular zone,where the higher is the liquid phase concentration,the lower is the separation *** is found that by changing the operating condition and the annular zone height the vortex can be strengthened but not enlarged by the inlet *** screw pitch is not affected by both inlet velocity and annular zone *** liquid phase concentration in the top liquid ring decreases with both the increases of inlet velocity and annular zone *** total pressure drop is almost not affected by the annular zone height but is obviously affected by the inlet *** the height of annular zone is more than 940 mm,the separation efficiency is not ***,the annular zone height of 940 mm is thought to be the most economical design.

关键词： Gas-liquid separator Vortex separation Structural optimization Separation performance Computational fluid dynamics