莫来石蜂窝陶瓷的阻力特性

本文以实验为基础,通过搭建的蜂窝陶瓷蓄热体阻力特性实验台,对莫来石蜂窝陶瓷的阻力特性进行了实验研究。研究表明:蜂窝陶瓷的阻力损失随蓄热体长度增加而增大,随孔隙率增加而减小;在蜂窝陶瓷的长度一定时,其阻力损失随雷诺数增加而增大,随气体流速增加而增大。根据实验数据得到了蜂窝陶瓷蓄热体摩擦阻力系数实验关联式,为煤矿乏风氧化装置的设计提供了数据支持。     

蜂窝陶瓷催化剂的开发及其应用

阐述了堇青石质蜂窝陶瓷及贵金属催化剂的工艺过程和特性，并探讨了蜂窝陶瓷催化剂的应用范围。     

堇青石蜂窝陶瓷负载CuO/CeO2-ZrO2/TiO2催化氧化含酚废水的性能研究

选取球状堇青石蜂窝陶瓷作为催化剂基体,制备了堇青石蜂窝陶瓷负载CuO/CeO2-ZrO2/TiO2催化剂,采用XRD、BET等方法对其进行了结构表征,测定了其催化湿式氧化含酚废水的活性及抗压强度、脱落率、Cu2+溶出浓度等性能指标.结果表明,CuO/CeO2-ZrO2/TiO2堇青石蜂窝陶瓷催化剂在反应温度180℃、压力5Mpa、搅拌速率为600r/min时,催化湿式氧化反应200minCOD去除率可达92.7％;球状堇青石蜂窝陶瓷CuO/CeO2-ZrO2/TiO2催化剂具有强度高、易装填、易更换、脱落率低特点,Cu2+溶出浓度低于环保排放标准,适合工业化处理含酚废水.     

加热体积膨胀剂对壁流式蜂窝陶瓷堵孔材料膨胀性能的影响

研究了壁流式蜂窝陶瓷堵孔材料的制备工艺,探讨了加热体积膨胀剂的加入量、烧成温度以及各烧成温度下堵孔材料的膨胀与收缩情况对壁流式蜂窝陶瓷堵孔材料膨胀性能的影响。研究结果表明,当配方中加入25 wt%的加热体积膨胀剂,在1160℃下烧成,可以制备出与壁流式蜂窝陶瓷载体结合牢固,抗折强度为3.72 MPa且干燥收缩率和烧成收缩率符合壁流式蜂窝陶瓷性能要求的堵孔材料。     

堇青石蜂窝陶瓷烧成工艺的研究

本文研究了堇青石蜂窝陶瓷的性能随烧成温度和保温时间变化的规律;通过对试样进行Ｘ－射线衍射分析（ＸＲＤ）和扫描电镜观察（ＳＥＭ）,探讨了烧成温度和保温时间对董青石蜂窝陶瓷性能的影响机理。     

转轮连续进给式蜂窝陶瓷自动切割机的设计

分析了蜂窝陶瓷切割特点和目前蜂窝陶瓷切割机存在的问题,并对解决这些问题而设计的转轮连续进给式蜂窝陶瓷自动切割机的主要技术参数、结构特点和工作原理进行了详细介绍。     

堇青石蜂窝陶瓷烧成工艺的研究

本文研究了堇青石蜂窝陶瓷的性能随烧成温度和保温时间变化的规律;通过对试样进行Ｘ－射线衍射分析（ＸＲＤ）和扫描电镜观察（ＳＥＭ）,探讨了烧成温度和保温时间对堇青石蜂窝陶瓷性能的影响机理。     

陶瓷蜂窝——制造与应用

一、引言陶瓷蜂窝原意是指类似蜂窠、断面分布有正六角形贯通孔的陶瓷体。现在把凡是断面均匀分布有三角形、四角形、六角形、乃至圆形等贯通孔眼的整块陶瓷体都称之为陶瓷蜂窝。蜂窝陶瓷最早用作热交换器,随着汽车排气污染日趋严重,要求使用一种压力损     

高效节能内燃烧式热管创新设计

根据目前蓄热蜂窝陶瓷的发展与运用。本文基于蓄热蜂窝陶瓷的运用,介绍一种内燃烧式节能热管,采用分步均匀燃烧降低N的氧化物的排放,提高助燃空气的预热温度,相对提高了理论燃烧温度,提高了燃料热值的利用率。     

蜂窝陶瓷产品生产过程中废料的产生及再利用

陶瓷废料日益增多,它不仅对城市环境造成巨大压力．而且还限制了城市经济的发展及陶瓷工业的可持续发展．所以陶瓷废料的处理与利用非常重要。以蜂窝陶瓷产品为例。将其生产过程中产生废料的来源及种类进行了分析说明．同时将这些废料的回收利用途径进行了系统的介绍。     

Test results of a catalytically assisted combustor for a gas turbine

A catalytically assisted ceramic combustor for a gas turbine was designed and tested to achieve low NO_x emissions. This combustor is composed of a burner and a ceramic liner. The burner consists of an annular preburner, six catalytic combustor segments and six premixing nozzles, which are arranged in parallel and alternately. In this combustor system, catalytic combustion temperature is controlled under 1000 °C, premixed gas is injected from the premixing nozzles to the catalytic combustion gas and lean premixed combustion over 1300 °C is carried out in the ceramic liner. This system was designed to avoid catalyst deactivation at high temperature and thermal shock fracture of the ceramic honeycomb monolith of the catalyst. A 1 MW class combustor was tested using LNG fuel. Firstly, NO_x emissions from the preburner were investigated under various pressure conditions. Secondly, two sets of honeycomb cell density catalysts and one set of thermally pretreated catalysts ware applied to the combustor, and combustion tests were carried out under various pressure conditions. As a result, it was found that the main source of NO_x was the preburner, and total NO_x emissions from the combustor were approximately 4 ppm (at 16% O₂) at an adiabatic combustion temperature of 1350 °C and combustor inlet pressure of 1.33 MPa.     

High strength and microwave-absorbing polymer-derived SiCN honeycomb ceramic prepared by 3D printing

The combination of 3D printing technology and polymer-derived ceramic route provides an attractive strategy to construct microwave-absorbing honeycomb with fine structure through flexible process. However, preparation of honeycomb ceramics with both excellent mechanical and microwave-absorbing properties is still challenging. Herein, SiCN honeycomb ceramic was fabricated by stereolithography from UV curable polymeric precursor consisting of polysilazane and multifunctional acrylates. By optimizing the multifunctional acrylates and its ratio, the decomposition of organic moiety and the ceramization process of precursor are matched, rendering the achieved ceramic with high compactness. The hardness and specific compressive strength of SiCN honeycomb ceramic reach as high as 14.3 GPa and 333.3 MPa/(g·cm³), respectively. Meanwhile, at low pyrolysis temperature, the copolymerized acrylate and polysilazane that formed during curing process was converted to free-carbon nanodamins in-situ, which endows SiCN honeycomb ceramic with the minimum reflection loss of –49.0 dB, namely microwave absorption rate over 99.99%.     

Catalytic Activity of Ceramic Honeycombs in the Exhaust Gas Oxidation of a Waste Treatment Plant

The activity of ceramic honeycombs with varying material composition and degree of utilization is compared on a suitable model gas in a test plant. The tested honeycombs are standard products that have not been surface‐treated in any way. A propane‐air mixture was fed to the test plant and then oxidized in a high‐temperature furnace. The analysis of the conversion rate over the reaction temperature showed remarkable differences in activity. The honeycomb with the most promising results was further investigated with the exhaust gas from the drying process of a waste treatment plant. Finally, the activity of this honeycomb was assessed in a large‐scale trial in an existing running regenerative thermal oxidizer.     

蜂窝陶瓷蓄热体的抗热震性研究进展

本文针对高风温燃烧技术和煤矿乏风瓦斯氧化技术的蜂窝陶瓷蓄热体,系统地综述了影响蓄热体抗热震性的因素,数值模拟分析了蓄热体在热冲击下的温度场和热应力场的分布特点,总结了蜂窝陶瓷蓄热体热震损伤机理等的研究进展情况,并提出今后的研究及发展方向。     

矿井乏风低浓度瓦斯氧化数值模拟研究

针对矿井回风流中的低浓度瓦斯进行回收技术的研究,利用FLUENT软件,建立物理模型和数学模型,针对陶瓷蜂窝蓄热氧化装置的情况,对乏风中的甲烷浓度,蜂窝陶瓷的孔隙率,乏风的风量对低浓度瓦斯氧化效果的影响进行研究,研究结果表明：乏风中甲烷浓度要适中才能更好的氧化效果,浓度过大影响CH4的转化率;蜂窝陶瓷的孔隙率越大越有利于乏风中甲烷的转化;乏风量对CH4的转化有着重要的影响,风量应当适中,不宜太大或者太小。     

新型蜂窝陶瓷的研制

开发适用于高效换热器用的蓄热体——对新型蜂窝陶瓷的结构、原料选用、成形方法以及干燥烧结进行了系统研究，使蜂窝陶瓷的抗热震性等性能大大提高，确定了一套合理的生产蜂窝陶瓷的工艺制度，并且使其能够满足生产实际需要。     

Modeling of Multiphase Transport during Drying of Honeycomb Ceramic Substrates

Multiphase transport model to simulate drying of honeycomb ceramic substrates in a conventional (hot air) drier is developed. Heat and moisture transport in the honeycomb walls as well as channels is modeled. The model predictions are validated against experiments done for drying of cylinder-shaped substrates by comparing histories and axial profiles of moisture loss and point temperature histories at various locations. Drying experiments are performed at two different values of air temperature, 103°C and 137°C, at a relative humidity value of 5%. Sensitivity analysis reveals that the drying process is controlled by heat and water vapor transport. External heat transfer is the dominant resistance mechanism for energy transport, whereas internal convection and binary diffusion dominate the resistance to vapor transport.     

离心铝热法制造陶瓷衬里复合管 Ⅰ.陶瓷衬里不锈钢短管的研制

研究了离心铝热法制造陶瓷衬里不锈钢短管的工艺。认为合适的条件是：离心分离因素为２００,铝热剂与不锈钢短管的重量比为０．５５～０．６,添加剂为锆英砂。陶瓷衬里管能够承受８００℃的热冲击。讨论了预热温度和气相压力对陶瓷衬里层表面质量的影响。     

Effect of impregnation conditions on prepreg properties and honeycomb core crush

The effects of fiber tension, line speed, and impregnation temperature and pressure in the prepregging process used to manufacture a commercial high temperature toughened epoxy prepreg were investigated in a Design of Experiments (DOE) to understand core crush in honeycomb composite structures. The prepregs developed in this DOE were characterized by tack, permeation, optical microscopy, and frictional resistance. Of these methods, frictional resistance was found to correlate with core crush. Tack, permeation, and optical microscopy provided a basis for understanding this relationship through impregnation and morphology. Prepregs manufactured with high fiber tension showed greater crush and less frictional resistance than prepregs with manufactured low fiber tension. These low tension prepregs were found to have more fibers at the prepreg surface, allowing them to grip the adjacent surface and resist slippage. By identifying the key factors influencing honeycomb core crush, the prepregging process was modified, producing a crush-resistant prepreg for end use manufacture.