蓄热燃烧蓄热体的应用现状与发展趋势

介绍了蓄热燃烧技术和蓄热体的发展与使用现状.陶瓷-金属蜂窝蓄热体在保留蜂窝陶瓷蓄热体优点的同时,克服了使用寿命短的缺点,为高温空气燃烧技术在不同的应用场合提供了更多的选择,是工作温度在1300℃以下的高温空气燃烧系统理想的蓄热体.     

蜂窝陶瓷蓄热体传热与阻力特性的热态实验研究

采用热态实验方法对蜂窝陶瓷蓄热体进行研究,通过对实验数据的分析,得出了蓄热室内的温度分布;蜂窝陶瓷蓄热体传热系数、阻力损失随空气流量的变化关系;传热系数随炉膛温度的变化关系;热效率和温度效率随比表面积的变化关系等,为蓄热式燃烧器的工业设计提供了依据.     

蜂窝陶瓷蓄热体换热器的热动态特性实验研究

对高温空气燃烧技术中的关键设备--蜂窝陶瓷蓄热体换热器的热动态特性进行了实验测试.结果表明:蜂窝陶瓷蓄热体换热器的压力损失随着空气流速以及蓄热体长度的不同而变化,但总体上压力损失并不大;四通换向阀的换向周期、蜂窝陶瓷蓄热体换热器的体积等是影响其温度效率、热回收率等热性能的重要因素.     

陶瓷蜂窝蓄热体内传热与应力应变场的研究现状及其发展趋势

综述了国内外对高温空气燃烧系统中陶瓷蜂窝蓄热体传热过程的研究及在此基础上进行的热应力应变研究的发展进程和现状,在此基础上对陶瓷蜂窝蓄热体内传热与应力应变场的研究发展趋势作了展望.可以确信,深入认识和掌握蓄热体的热工特性及热应力应变分布规律,对我国发展和应用蓄热式高温空气燃烧技术具有重要的理论意义和现实意义.     

自蓄热式高温空气燃烧技术的开发

分析了切换式蓄热燃烧系统的优点与不足．开发了可连续燃烧的自蓄热高温空气燃烧器。燃烧器采用陶瓷－金属蜂窝蓄热体以及蓄热燃烧专用高温切换阀技术．可以实现高温烟气余热的“极限稳定回收”以及高温贫氧空气的“连续燃烧”。     

高温空气发生器综合状态图研究

开发一种高温空气发生器.运用蜂窝陶瓷蓄热体高效换热规律,引入燃空比、分流比和辅助空气添加比,研究燃用丙烷时发生器稳定运行条件和高温空气生成规律.无辅助空气的研究表明:生成高温空气温度升高,则其流量逐渐减小,装置经济性能变差;装置分流比小于75%;优化燃空比和分流比,可高效稳定地生成800～1 300℃高温空气.实验结果与理论规律吻合良好,高温空气温度误差小于6.2%.研究结论可为高温气化工艺操作优化提供参考.     

蜂窝型蓄热式燃烧系统的开发和应用

１蜂窝型蓄热式燃烧系统的结构与性能蜂窝型蓄热式燃烧系统［ＨＲＳ型,Ｈｉｇｈ－ｃｙｃｌｅＲｅｇｅｎｅｒａｔｉｖｅＣｏｍｂｕｓｔｉｏｎＳｙｓｔｅｍ］主要部件有蓄热体（陶瓷蜂窝体）、烧嘴和烟气／空气切换阀。１．１蜂窝型陶瓷蓄热体评价蓄热式烧嘴的指标主要有：...     

新型蓄热式燃烧技术在南钢中板厂的应用

论述了蓄热式高温空气燃烧技术(HTAC)的发展历史与技术原理及其特点,介绍了两种蓄热体陶瓷小球和蜂窝陶瓷蓄热体的性能比较。阐述了南钢中板厂采用蓄热式(HTAC)燃烧技术改造中板加热炉的节能、环保应用效果和技术优势及经验体会等。实践表明,新型高温空气燃烧技术是一项高新燃烧技术。该技术解决了多年困扰传统燃烧方法的(低耗)问题,具有污染量大幅度降低等多项优点。     

换向时间对蓄热式燃烧的影响

实验研究了换向时间对蓄热式燃烧的炉温波动性、炉温分布均匀性、蓄热体换热效率以及炉子热效率的影响,证明缩短换向时间可提高蓄热体换热效率及炉子热效率,但换向时间缩短到一定程度后,效率增长不大,从而可确定最佳换向时间。     

高温空气发生器的分析与探讨

概述了我国发展生物质高温空气气化(HTAG)系统的必要性和高温空气发生器的重要性,介绍了高温空气发生器的组成及工作原理,详述了其关键技术:高温空气燃烧技术。对关键部件:蜂窝陶瓷蓄热体、实现分级燃烧和炉内烟气再循环的燃烧器及四通高频切换阀进行了阐述,并对高温空气发生器的基本特性进行了分析,最后对高温空气发生器的开发与应用进行了探讨。     

熔炼次数对M17返回料合金成分、组织和性能的影响

实验结果表明,M17铸造高温合金(%:0.16C、8.79Cr、5.79A1、4.93Ti、3.29Mo、15.20Co、0.78V、0.015B、0.073Zr、0.002S、0.001P、0.001 1O、0.001 0N)经25 kg真空感应炉返回重熔后,Si含量随重熔次数的增加而略有增加,合金中主要元素和其它杂质元素S、P、H的含量变化不大,而氧、氮略有增加;合金中初生碳化物由新合金中的草书体逐渐向返回合金块状转变,初生碳化物的遗传性堵塞合金凝固时的补缩通道,使返回料合金的疏松倾向增大,高温塑性下降较大。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.