共查询到19条相似文献,搜索用时 163 毫秒
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我国锻造工业炉的现状及发展趋势 总被引:1,自引:0,他引:1
阐述了铸造工业炉燃料构成,炉型结构,燃烧装置,余热利用,耐火材料及热工控制等方面的技术现状,以及煤炉改造及高性能锻造工业炉的发展趋势。 相似文献
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炉外精炼不同加热方法的能源利用效率能够更全面地反映能源的利用情况。本文对燃料燃烧加热、电弧加热和铝氧化加热三种加热方式的能源利用效率进行了分析计算,结果表明,能源利用最好的是燃料燃烧加热,其能源利用效率是其它两种方法的1.5~2倍。电弧加热的能源利用效率稍高于铝氧化加热的能源利用效率。从节约能源的角度出发,应尽可能利用燃料燃烧加热补偿温度损失,将铝氧化加热作为调整温度的补充手段。 相似文献
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近年来,围绕节能与保护地球生态环境燃料加热式工业炉的设计、结构、热加工工艺,控制等诸方面均发生了巨大变革。重点介绍了燃料加热式工业炉根据作业方式、加热方式、用途不同的分类。 相似文献
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对7MW的圆柱形工业炉内燃油喷雾燃烧过程进行模拟研究.模拟采用商业CFD软件Fluent对熔炉中的传热传质及反应过程进行建模.研究结果表明,通过燃烧器参数(相对空燃比,料滴直径,燃料喷雾半角)可以优化燃油喷雾燃烧状态.这些参数通过影响火焰的形状和稳定性,火焰的形状和稳定性最终将影响工业炉的性能,特别是加热功率和气体种类... 相似文献
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通过对我国燃料炉主要技术的介绍,描述了我国热处理燃料炉的现状,指出了高效节能和环境保护是热处理燃料炉发展的两大关键,要改变现有的能源消费结构,以实现“绿色工业炉”的追求目标。 相似文献
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根据《省级温室气体清单编制指南(试行)》,福建省能源活动温室气体包括化石燃料、生物质燃料燃烧活动产生的CO2、CH4和N2O排放及煤矿和矿后活动、石油和天然气系统产生的CH4逃逸排放。界定福建省能源活动过程温室气体的排放源及温室气体种类;给出各排放源相关的温室气体排放量估算方法,确定活动水平数据及排放因子,并估算各排放源温室气体的排放量;汇总化石燃烧排放的CO2量,化石燃料燃烧、生物质燃料燃烧、煤炭开采和矿后活动逃逸、石油和天然气系统逃逸排放的CH4量,化石燃料燃烧和生物质燃料燃烧排放的N2O量;生成福建省能源活动温室气体清单汇总,并根据福建省地区生产总值GDP得出碳强度趋势。 相似文献
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《Energy》2005,30(2-4):111-117
When we consider exergy analysis on combustion and thermodynamic processes, we introduce another concept against energy analysis, which is supported by an evaluation of its temperature level. When a higher temperature energy than that an ambient level is taken into consideration, it can be put for some domestic or industrial purpose. A medium temperature energy of 30–60 °C is used for domestic heating, and a high temperature of 200 °C and above is suitable for power generation or process heating. Therefore, we study exergy concept supported by temperature level. When we discuss power generation, a high temperature energy of 1500 °C and above in combined cycle has a higher conversion efficiency than that of 500–600 °C in steam cycle. If we try to apply high temperature air combustion, a preheated air temperature of 1000 °C and above can be produced by exhaust heat recovery from stack gas, which has been developed as a new technology of energy conservation. In this study, the authors present an exergy analysis on combustion and energy conversion processes, which is based on the above-mentioned concept of exergy and energy supported by temperature level. When we discuss high temperature air combustion in furnace, this process shows a higher performance than that of the ambient air combustion. Furthermore, when we discuss the power generation and heat pump processes, the minimum ambient temperature would already be known for each season, and the conversion performance can be estimated by the maximum operating temperature in their cycles. So, the authors attempt to calculate the exergy and energy values for combustion, power generation and heat pump processes. 相似文献
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As a kind of primary energy, the main utilization of coal is combustion. Coal combustion is the greatest atmospheric pollution source in China. In this paper, the authors analyze the evolution of the coal fired power plant/thermal power plant (CFP/TPP, denoted by CFP) in China from the past, when there were no measures taken against pollution, to the present, when the interest is aroused to provide depollution systems and installations. The results indicate that it is more efficient to introduce a desulfur installation rather than to introduce denox or decarbon systems for a CFP burning fuel with relatively high sulfur content. The plant is globally evaluated from the point of view of its energy ecological efficiency in this paper. Using the results of the analysis for the CFP, the authors similarly propose measures to improve the energy ecological efficiency of existing CFPs. To comply with the national norms regarding pollutant emissions for new units and those that are to be continued in use, particular measures should be taken to increase the ecological efficiency. 相似文献
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《Energy Conversion and Management》2002,43(9-12):1363-1375
Stoker-fired boilers are used for the combustion of coal and solid wastes. The most important disadvantage is their low thermal efficiency. The authors present methods of choosing the optimal rate of travel of the grid and height of the fuel layer basing on both realscale and laboratory measurements. Basing on industrial-scale experiments the authors calculated the optimal thermal efficiency and main energy losses using the least squares adjustment method. The stepwise regression method was used to correlate the main energy losses as functions of grid operating parameters. These correlations were used in the optimization method to estimate the optimal rate of travel of the grid and height of the fuel layer. The minimum retention time of the coal can be also calculated. 相似文献
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富氧燃烧技术在内燃机中的应用 总被引:5,自引:0,他引:5
利用高分子选择性气体分离膜对空气进行分离,从而得到含氧量≥28%的富氧空气用于工业燃烧,是一种节能效果好,经济效益高,可较少环境污染的高效燃烧技术。但是,这一燃烧新技术在应用最为广泛的动力机械-内燃机上却基本未得到研究和应用。 相似文献
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The objective of this paper is to assess the techno-economic viability of the use of fuel cell as an alternative technology for landfill gas energy recovery. The case of an Italian municipal solid waste landfill is analyzed. The landfill was opened in 1998 and in 2001 the energy recovery facility started operation. The current landfill gas conversion system is based on internal combustion engine technology. However, the drawbacks of internal combustion engine in terms of conversion efficiency and air emissions are widely acknowledged. Some authors have proposed molten carbonate fuel cell as one of the most interesting solution for landfill gas energy recovery for the near future. Fuel cells have proven capable of providing superior energy efficiency and environmental performance, but their widespread use is constrained by the capital cost required. Using actual data from the landfill, a comparison between the current energy recovery system and a hypothetical alternative solution based on molten carbonate fuel cell is performed. The analysis assesses the cost-effectiveness of the two solutions, considering also some environmental externalities usually not included in traditional economic assessment. The main strengths and weaknesses of the two landfill gas energy recovery systems are highlighted and some new insights into molten carbonate fuel cell overall sustainability are provided. 相似文献