共查询到20条相似文献，搜索用时 671 毫秒
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通过热轧加热炉烧嘴热态试验,分析了天然气掺烧条件下烧嘴流量特性的变化规律,结果表明:等热值条件下,随着天然气掺烧比例的增大,混合煤气密度增加,调焰烧嘴稳定燃烧时煤气压力提高;在天然气比例为22%时,煤气压力提高约20%。 相似文献
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田继宏 《鞍山师范学院学报》1999,(1)
根据燃烧器壳体的结构特点 ,对已加工好的燃烧器壳体就其在加工中所出现的精度问题进行了分析 ,找出了影响加工精度的主要因素 .在工艺上采取了改进措施 ,以提高其加工精度 . 相似文献
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建立了热风炉栅格燃烧器内空、煤气流动混合过程的三维物理、数学模型,对燃烧器内流场特性和组分浓度均匀性进行了数值模拟。计算结果揭示了燃烧器内空、煤气流场结构及混合过程;得到了燃烧器空气和煤气通道的阻力系数、速度均匀度以及组分浓度均匀度;同时分析了冷风配气均匀度的影响因素,为热风炉燃烧特性的研究奠定了基础。 相似文献
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Hendrik Dubbe Elena Holl Adriaan Spierings Konrad Wegener Ulrich Nieken 《浙江大学学报(A卷英文版)》2018,19(10):735-745
Examples of the use of additive manufacturing and rapid prototyping in a range of applications are of great interest in order to emphasize their role in development and production technology. In this study, a catalytic low temperature burner for H2 on a lab scale with an integrated flow distributor was designed, manufactured, and tested for functionality. Based on a theoretical approach, a flow distributor for the burner was designed and a prototype was built using fused deposition modeling (FDM). Based on test results, an optimized version of the burner was then designed and manufactured using selective laser melting (SLM). The functionality of the designed catalytic burner was proven. Several advantages were found in comparison to conventional non-catalytic burners. In particular, flameless uniform low temperature heat generation with temperatures of about 200 °C could be realized. This contribution highlights the potential of additive manufacturing in chemical engineering. Not only was the final product built using SLM, but also during the development process, FDM was used for rapid prototyping. 相似文献
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在锅炉用水的软化中 ,离子交换水处理方法是一种运行经济、先进可靠的方法 .采用此法只要操作得当 ,能使锅炉做到无垢或薄垢运行 ,减少检修费用 ,延长锅炉使用寿命 相似文献
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燃烧器附近结焦和炉膛内的大量结焦、积灰,常使空气动力工况遭到破坏,使炉膛出口温度升高,引起对流受热面壁温升高,破坏锅炉水循环,限制锅炉出力,降低锅炉的效率。本文针对电站锅炉燃烧器的特点,从燃料特性、锅炉设计及运行等方面分析造成结焦的原因,提出了防止结焦的措施。 相似文献
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王志磊 《扬州职业大学学报》2023,(1):51-55
唐代长柄香炉作为重要的宗教香器,与当时的佛道等宗教文化密切关联。长柄香炉的多样形制是佛教文化与本土文化融合并取其意合的结果,式样变化是由宗教的传入与使用环境所导致,真实功用则取自于宗教对烟文化的信仰。宗教文化对长柄香炉的影响是文化对器形的顺势而为,是用与式的合二为一,长柄香炉实则充当世人与宗教沟通的媒介。 相似文献
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土家族是一个古老的民族,在它漫长的生命历史演进的过程中有顺着历史发展的痕迹前进的生命凯歌,这是生命的主流。也有在生命之流遇到阻塞（即被逼入创世情境）时而留下的温情而又悲悯的烧火佬之歌,虽然它只是这个民族前进过程中的一支小流,可它在生命延续和谱系序列的链环上起到了很好的不可或缺的修补作用。本文从生命延续的角度,对土家族烧火佬现象的合理性作一个试探性的论析。 相似文献
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原子吸收法测定钢中微量镍的条件选择探讨 总被引：1，自引：0，他引：1
周玉敏 《忻州师范学院学报》2005,21(2):29-30
文章探讨了用日立Z-8000原子吸收光谱仪测定钢中微量镍时燃烧器高度的选择问题。日立Z-8000原子吸收光谱仪测定某种元素时,微机会自动选择测试条件,但在实际检测中,由于影响和干扰分析测定的因素很多,往往微机所给出的测定条件不一定是最佳的,因此在用日立Z-8000原子吸收光谱仪测定某种元素时需要通过实验来确定一些重要的测定条件,以保证分析结果的准确可靠。 相似文献
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Jayson L. Dibble Michelle Drouin Krystyna S. Aune Robert R. Boller 《Communication quarterly》2013,61(3):329-344
The term “back burner” describes a desired potential romantic/sexual partner with whom one communicates with the intent of establishing a future romantic or sexual connection. Contemporary communication technologies (e.g., mobile phones, social networking applications) facilitate connections with back burners. Two survey studies (Ns = 347, 374) showed that back burner communication is relatively common among college students; however, college students also have many romantic or sexual interests that they do not consider back burners. Additionally, although most college students will not fully disclose their communication with back burners to their partners, approximately half fully disclose communication with romantic or sexual desirables to their partners. Therefore, the results of this study suggest that back burners can be distinguished from those with whom we would entertain having a romantic or sexual connection. Theoretically, they can also be distinguished from other types of casual sexual relationships. 相似文献
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邓小艳 《湖北第二师范学院学报》2014,(11):19-21
《猴山上的梦》是1992年诺贝尔文学奖获得者德里克·沃尔科特的著名诗剧。该剧主要围绕主人公烧炭翁马卡克的梦幻与疯癫的故事展开。本文试图借助霍米·巴巴关于矛盾状态、模仿与混杂性的后殖民理论,探讨沃尔科特如何成功通过该剧的人物塑造,由个体到群体,深刻揭示加勒比海地区殖民地人民心理沉积与生存状态,发出他们被压抑的声音,建构混杂的文化身份。 相似文献
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结合传热学、燃烧学、自动控制原理、热工测量及仪表等专业知识,开发了该低氧弥散燃烧实验系统。实验系统主要由高温烧嘴、蓄热室、四通阀、热工检测及控制系统等组成,该系统可以开出热工、自动控制等多个综合性和研究性实验,形成了创新学科、科研项目与实验教学的互动平台,提高了实验室整体科研条件和学科发展水平。 相似文献
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王善才 《福建师大福清分校学报》2007,(1):1-3
我国古籍<山海经>中关于"西南有巴国"的记载,一向很受人们重视.但这古巴国的地望究竟在哪里?距今年代有多久?可又众说纷纭,难于定论.直到鄂西长阳香炉石古文化遗址的发现,我国早期巴人的起源地和古巴国的地望与年代才豁然开朗.因该遗址出土了大量夏、商、周时期古代巴人的可靠遗物,并颇有代表性.故这一重要考古发现,不仅解开了巴人的起源之谜,而且也充分印证了<山海经>的记载是准确可信的,其史料价值不可低估. 相似文献
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研制了一种温差电效应发电演示热功小车,演示了从热能到电能再到机械能的能量转换过程。该小车以温差发电为电源,利用珀尔帖片、散热片与酒精灯构成核心组件,由酒精灯加热下散热片,下散热片将热量集中到珀尔帖片,珀尔帖片通过上散热片散热,维持珀尔帖片冷热两面有较大温差,输出电能驱动电机旋转,电机带动小车跑动。该小车结构简单,工作原理明晰易懂,运动速度达15 cm/s,演示结果达到了引起人们对温差发电的关注和研究的目的。 相似文献
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Elana Maryles Sztokman 《Journal of Jewish Education》2013,79(2):150-172
The religious school, where young people are brought into religious life and practice, the development of a religious belief system is often neglected. Religiousness is often instilled as a linear end product, a monolithic corpus of ideas to be singularly transmitted and subsequently owned by youth. However, educational research by Gareth Matthews, Nel Noddings, and others suggests that youth are thirsting for opportunities to grapple, question, and wrestle with profound theological and philosophical issues—a process that leads to a richer religious identity. This article, based on three years of ethnographic research, looks at the way in which four teachers from one religious girls' high school in Israel executed theological education, from indoctrination with a pretty face, to the theological Bunsen burner. The dynamic between teachers' voices and students' voices sheds light on adolescent religious identity, and offers vital insights for religious education. 相似文献
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采用因子分析法对2005年和2006年西部12省区的经济发展状况进行综合评价排序,从实证角度,还结合各省区的一些特殊情况,将西部各省区经济发展状况归纳为四种类型,并对各类省区的发展状况作深入分析及提出相应的发展对策建议。 相似文献
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