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Experimental Study on Structural Optimization of a Supercritical Circulating Fluidized Bed Boiler with an Annular Furnace and Six Cyclones

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Journal of Thermal Science 2017年第5期26卷 472-482页

作者： WANG Xiaofang shuai daping LYU Qinggang Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China

Annular furnace CFBs with six cyclones represent new designs for large capacity CFB boilers over 660 MW. To investigate the gas-solid flow non-uniformity and its main influencing factors, an experimental study was carried out in the cold-test rig of an annular furnace CFB with six cyclones. The influence of furnace structure and cyclone arrangement on the non-uniformity of gas-solid flow was obtained. On the basis of these findings, the structure of the annular furnace CFB with six cyclones was optimized, and an optimal structure was obtained. The results show that for newly designed annular furnace CFBs, the non-uniformity of gas-solid flow among loops is no greater than that of traditional CFBs. In terms of uniformity, side cyclones rotating inward are superior to those rotating outward. The position of the side cyclones determines the basic solid circulating rate distribution trend and can dramatically improve flow non-uniformity. The middle cyclone positions and the symmetric modes of the cyclones do not determine the solid circulating rate distribution trend and have less effect on DEVGs. Forty-five degree chamfers of outer ring walls can reduce wall erosion and the non-uniformity of gas-solid flow in the circulating fluidized bed. Regarding the operating and structural conditions in this work, the optimal structure of annular furnace CFBs is Type 6: side cyclones rotating inward and b = a/2, d = 0.1c; the center of the middle cyclone inlet located at the centerline of the furnace cross-section; cyclones on the two sides of the furnace in an axisymmetric arrangement; and a furnace corner shape of 45° chamfers. Under the given operating conditions, the DEV_(Gs) for the optimal structure are approximately 4.0%~10.3%.

关键词： circulating fluidized bed annular furnace parallel cyclones flow non-uniformity structure optimization

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Hydrodynamics in a Circulating Fluidized Bed with Annular Furnace and Six Parallel Cyclones

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Journal of Thermal Science 2017年第3期26卷 273-281页

作者： shuai daping WANG Xiaofang LYU Qinggang Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing100049China

Systematic measurements were conducted on a cold CFB with annular furnace and six parallel cyclones to study gas-solids flow in the annular furnace and flow non-uniformity among six cyclones. The results show that axial solids holdup in the annular furnace decreases exponentially with height, similar to the conventional rectangular furnace. The uniform transverse distribution of solids holdup suggests a good gas-solids mixing in the annular furnace. The annular furnace presents the core/double-annulus flow structure, and it results in enhanced gas-solids back-mixing than the conventional core/annulus flow structure. The gas-solids flow of the inner wall-layer and the outer wall-layer is very close at most part of the furnace height, and the wall-layer thickness decreases with height. Flow non-uniformity exists among six parallel cyclones in the annular furnace CFB. But non-uniform distribution of solids circulating rates and cyclone pressure drops show no regularity, and the flow non-uniformity is no larger than the CFBs with conventional furnace. Under typical operating conditions, the relative deviation of six solids circulating rates is 8.0%.

关键词： Circulating fluidized bed annular furnace parallel cyclones flow structure flow non-uniformity

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六回路环形炉膛循环流化床结构布置实验研究

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中国电机工程学报 2018年第2期38卷 356-362页

作者：王小芳帅大平吕清刚中国科学院工程热物理研究所北京市海淀区100190 中国科学院大学北京市石景山区100049

针对新型超（超）临界循环流化床锅炉炉型——环形炉膛六回路循环流化床进行冷态实验研究,考察结构布置对炉膛内颗粒浓度轴向分布和六循环回路间气固流动不均匀特性的影响。实验结果表明,悬吊屏布置、六分离器对称布置方式和环形炉膛内... 详细信息

针对新型超（超）临界循环流化床锅炉炉型——环形炉膛六回路循环流化床进行冷态实验研究,考察结构布置对炉膛内颗粒浓度轴向分布和六循环回路间气固流动不均匀特性的影响。实验结果表明,悬吊屏布置、六分离器对称布置方式和环形炉膛内环结构均对环形炉膛颗粒浓度轴向分布影响很小;布置悬吊屏、将六分离器布置方式由轴对称改为中心对称以及将环形炉膛内环结构由双水冷柱改为单水冷柱均对六回路循环流率的不均匀分布有改善作用,但改善作用有限且不改变六回路循环流率的分布规律;通过与已有的研究对比,推断出影响六回路循环流率分布均匀性的关键结构因素可能在于两端分离器的布置方式和炉膛外环切角结构。

关键词：循环流化床(CFB) 超(超)临界环形炉膛六分离器结构布置

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六分离器并联布置的双水冷柱炉膛循环流化床实验研究

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中国电机工程学报 2016年第3期36卷 723-728页

作者：帅大平吕清刚王小芳宋维健孙运凯中国科学院大学北京市石景山区100049 中国科学院工程热物理研究所北京市海淀区100190

针对新型超临界循环流化床锅炉炉型——六分离器并联布置的双水冷柱炉膛循环流化床进行冷态实验研究,考察其炉膛内颗粒浓度分布和各循环回路间气固流动不均匀特性。实验结果表明,炉膛内颗粒浓度轴向分布规律与矩形单炉膛循环流化床一致... 详细信息

针对新型超临界循环流化床锅炉炉型——六分离器并联布置的双水冷柱炉膛循环流化床进行冷态实验研究,考察其炉膛内颗粒浓度分布和各循环回路间气固流动不均匀特性。实验结果表明,炉膛内颗粒浓度轴向分布规律与矩形单炉膛循环流化床一致,呈下浓上稀的分布。在所示的分离器布置结构下,6个循环回路间存在明显的气固流动不均匀现象,且不均匀性主要存在于炉膛同一侧的3个回路间,循环流率、炉膛底部颗粒浓度和炉膛出口附近颗粒浓度都呈现"中间低两端高"的分布特点。循环流率分布不均匀性随表观气速的增大而增强,受静止床高的影响很小。炉膛中布置双水冷柱对六分离器并联布置循环流化床系统的气固流动不均匀性影响很小。

关键词：双水冷柱六分离器循环流化床流动不均匀性

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应用Solidworks对棋盘式纸浆模塑结构及其模具的设计

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包装学报 2010年第2期2卷 43-47页

作者：邓瑶瑶徐弘帅大平朱小东湖南工业大学机械工程学院湖南株洲412008

针对环保型纸浆模塑制品相对其他包装制品在结构承载、缓冲能力上的不足,提出了具有较好承载和缓冲能力的纸浆模塑棋盘式结构。结合纸浆模塑制品技术要求和生产实际,应用Solidworks进行纸浆模塑棋盘式结构设计、分析和模具设计,并且生... 详细信息

针对环保型纸浆模塑制品相对其他包装制品在结构承载、缓冲能力上的不足,提出了具有较好承载和缓冲能力的纸浆模塑棋盘式结构。结合纸浆模塑制品技术要求和生产实际,应用Solidworks进行纸浆模塑棋盘式结构设计、分析和模具设计,并且生产出纸浆模塑棋盘式结构制品。

关键词：纸浆模塑棋盘式结构模具设计 Solidworks

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基于LOM原型的电铸载体比较

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湖南工业大学学报 2007年第5期21卷 39-41页

作者：朱小东李国兵徐弘帅大平湖南工业大学快速成形研究所湖南株洲412008

以L O M原型为基础,分别翻制出环氧树脂模型、硅橡胶模型、树脂片材模型和石膏模型,并对它们的电铸载体进行可行性分析比较,在不影响电铸质量的前提下,根据不同结构特征选择合适的电铸载体。

关键词： LOM原型电铸载体环氧树脂模型硅橡胶模型石膏模型树脂片材模型

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六回路环形炉膛循环流化床试验研究

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洁净煤技术 2015年第2期21卷 30-34页

作者：王小芳帅大平吕清刚孙运凯王法军宋国良中国科学院工程热物理研究所北京100190 中国科学院大学北京100049

针对大型循环流化床锅炉存在的二次风穿透不佳、受热面布置困难等问题,提出了适用于600 MW等级及以上超(超)临界循环流化床锅炉的炉型——六回路环形炉膛循环流化床,并进行冷态试验研究,考查环形炉膛内气固流动特性和六回路间循环流率... 详细信息

针对大型循环流化床锅炉存在的二次风穿透不佳、受热面布置困难等问题,提出了适用于600 MW等级及以上超(超)临界循环流化床锅炉的炉型——六回路环形炉膛循环流化床,并进行冷态试验研究,考查环形炉膛内气固流动特性和六回路间循环流率分布特性。结果表明:颗粒浓度沿环形炉膛高度的分布与矩形单炉膛相似,呈下浓上稀的指数型分布;随着流化速度的增大,炉膛下部密相区颗粒浓度减小,炉膛中上部和出口区域的颗粒浓度增大,各回路的循环流率均明显增大;随着静止料层高度的增大,整个炉膛高度的颗粒浓度都增大且高度越高处增幅越小;流化速度较低时循环流率不因静止料层高度的增大而变化,流化速度较高时循环流率随静止料层高度增大而稍有增大;六回路间循环流率的分布较均匀,设计工况下循环流率的相对偏差为4.5%;环形炉膛内环长边壁面悬吊屏对循环流率的大小和分布影响较小。

关键词：环形炉膛六分离器颗粒浓度循环流率

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A comparative study of human and porcine-derived decellularised nerve matrices

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Biomaterials Translational 2023年第3期4卷 180-195页

作者： Rui Li shuai Qiu Weihong Yang Zilong Rao Jiaxin Chen Yuexiong Yang Qingtang Zhu Xiaolin Liu Ying Bai daping Quan Guangdong Engineering Technology Research Centre for Functional Biomaterials School of Materials Science and EngineeringSun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Key Laboratory for Polymeric Composite&Functional Materials of Ministry of Education School of ChemistrySun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Guangdong Engineering Technology Research Centre for Peripheral Nerve Tissue Department of Orthopaedic and MicrosurgeryThe First Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Guangzhou Zhongda Medical Equipment Co. Ltd.GuangzhouGuangdong ProvinceChina

Decellularised extracellular matrix(dECM)biomaterials originating from allogeneic and xenogeneic tissues have been broadly studied in the field of regenerative medicine and have already been used in clinical *** dECMs are considered more compatible,but they have the drawback of extremely limited human tissue *** availability is also restricted by the health and age of the *** investigate the viability of xenogeneic tissues as a substitute for human tissues,we fabricated both porcine decellularised nerve matrix(pDNM)and human decellularised nerve matrix for a comprehensive *** showed that both dECM scaffolds retained the ECM microstructures of native human nerve *** analysis demonstrated that the protein compositions of both dECMs were also very similar to each *** functional ECM contents effectively promoted the proliferation,migration,and maturation of primary human Schwann cells in ***,pDNM contained a few antigens that induced severe host immune responses in humanised ***,after removing theα-galactosidase antigen,the immune responses were highly alleviated and the pre-treated pDNM maintained a human decellularised nerve matrix-like pro-regenerative ***,we believe that anα-galactosidase-free pDNM may serve as a viable substitute for human decellularised nerve matrix in future clinical applications.

关键词： allogeneic decellularised nerve matrix immune response xenogeneic α-Gal

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国产操作系统、数据库及安全产品发展情况综述

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中国数字医学 2024年第4期19卷 1-9页

作者：刘沛秦蔚蓉李帅闫炎黄昊陆军军医大学大坪医院信息科重庆400042 陆军军医大学第二附属医院信息科

随着我国技术创新能力提升,国产信息化产业得到大力发展,在市场中形成了独特的价值链和供应链。国产操作系统、数据库及安全产品是推进各行业信息化发展和信息化进程的重要技术产品,在当前的信息化管理进程中发挥着非常重要的作用。为... 详细信息

随着我国技术创新能力提升,国产信息化产业得到大力发展,在市场中形成了独特的价值链和供应链。国产操作系统、数据库及安全产品是推进各行业信息化发展和信息化进程的重要技术产品,在当前的信息化管理进程中发挥着非常重要的作用。为梳理国产化软件产业发展现状,对国产化软件中的操作系统、数据库及安全产品等进行综述,并分析了国产信息化产业所面临的挑战和未来的发展路径。

关键词：信息技术应用创新操作系统数据库

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Successful multidisciplinary therapy for a patient with liver metastasis from ascending colon adenocarcinoma:A case report and review of literature

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World Journal of Clinical Cases 2023年第7期11卷 1498-1505页

作者： Xiao-Rong Tan Juan Li Hua-Wei Chen Wei Luo Nan Jiang Zheng-Bo Wang shuai Wang Oncological Department of Oral and Maxillofacial Surgery The First Affiliated Hospital of Xinjiang Medical UniversitySchool/Hospital of Stomatology Xinjiang Medical UniversityUrumqi 830054Xinjiang Uygur Autonomous RegionChina Department of Oncology Daping HospitalArmy Medical UniversityChongqing 400042China

BACKGROUND Liver metastasis is the most common form of distant metastasis in colorectal cancer,and the only possible curative treatment for patients with colorectal liver metastases(CRLM)is ***,approximately 25%of patients with CRLM have indications for liver resection at the initial *** aimed at downstaging large or multifocal tumors to enable curative resection are *** SUMMARY A 42-year-old man was diagnosed with ascending colon cancer and liver *** to the huge lesion size and compression of the right portal vein,the liver metastases were initially diagnosed as unresectable *** patient was treated with preoperative transcatheter arterial chemoembolization(TACE)consisting of 5-fluorouracil/Leucovorin/oxaliplatin/Endostar®.After four courses,radical right-sided colectomy and ileum transverse colon anastomosis were ***,the pathological analysis revealed moderately differentiated adenocarcinoma with necrosis and negative ***,S7/S8 partial hepatectomy was performed after two courses of neoadjuvant *** examination of the resected specimen revealed a pathologically complete response(pCR).Intrahepatic recurrence was detected more than two months after the operation,and the patient was then treated with TACE consisting of irinotecan/Leucovorin/fluorouracil therapy plus Endostar®.Subsequently,the patient was treated with aγ-knife to enhance local ***,a pCR was reached,and the patient's overall survival time was>9 *** Multidisciplinary treatment can promote the conversion of initially unresectable colorectal liver metastasis and facilitate complete pathological remission of liver lesions.

关键词： Initially unresectable colorectal liver metastasis Conversion chemotherapy Multidisciplinary therapy Pathological complete response Transcatheter arterial chemoembolization Case report

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