A renovation project of miniaturization and high efficiency is provided for the hot blast stove .The experimental data tested feasibility of the new-type swirl flow hot blast stove. The normal and hot state experiment...A renovation project of miniaturization and high efficiency is provided for the hot blast stove .The experimental data tested feasibility of the new-type swirl flow hot blast stove. The normal and hot state experiments have been done through changing the angle of gas entering into the regenerator. Factors influencing pressure drop have been studied and analyzed. The experimental results can be formulated in the form of the Ergun equation. The regression equation is obtained. And two modified coefficients are offered to the regenerator pressure drop of the new-type swirl flow hot blast stove.展开更多
再生器是溶液除湿系统中的关键部件之一,提高再生器综合性能是解决极端热湿气候区高湿问题的有效手段。将指标相关法(CRITIC,Criteria Importance Through Intercriteria Correlation)和优劣解距离法(TOPSIS,Technique for Order Prefer...再生器是溶液除湿系统中的关键部件之一,提高再生器综合性能是解决极端热湿气候区高湿问题的有效手段。将指标相关法(CRITIC,Criteria Importance Through Intercriteria Correlation)和优劣解距离法(TOPSIS,Technique for Order Preference by Similarity to Ideal Solution)联合,建立CRITIC-TOPSIS模型,用于再生器运行入口参数(空气质量流量、溶液质量流量、温度)的选择评价。以永暑岛礁地区为例,通过再生器处理模型得到基础数据以及4个指标的评价体系,采用CRITIC法求得权重后使用TOPSIS法对220种运行入口参数的组合方案进行评价得到最优解。结果表明,空气质量流量为0.1 kg/s、溶液质量流量为0.3 kg/s、溶液温度为56℃时得分0.885,为永暑地区再生器综合性能最优解;再生量指标的权重为0.4,可作为永暑地区再生器综合性能的代表性指标。展开更多
Advanced integrated gasification combined cycle （IGCC） power generation systems require the development of high-temperature, regenerable desulfurization sorbents, which are capable of removing hydrogen sulfide from ...Advanced integrated gasification combined cycle （IGCC） power generation systems require the development of high-temperature, regenerable desulfurization sorbents, which are capable of removing hydrogen sulfide from coal gasifier gas to very low levels. In this paper, zinc ferrites prepared by co-precipitation were identified as a novel coal gas desulfurization sorbent at high temperature. Preparation of zinc ferrite and effects of binders on pore volume, strength and desulfurization efficiency of zinc ferrite desulfurizer were studied. Moreover, the behavior of zinc ferrite sorbent during desulfurization and regeneration under the temperature range of 350-400 ℃ are investigated. Effects of binders on the pore volume, mechanical strength and desulfurization efficiency of zinc ferrite sorbents indicated that the addition of kaolinite to zinc ferrite desulfurizer seems to be superior to other binders under the experimental conditions.展开更多
[目的]为未来开展森林生态系统恢复和经营管理提供参考依据。[方法]基于Web of Science和中国知网数据库,通过可视化文献分析工具CiteSpace,对2000至2021年全球已发表的有关森林生态系统植被自然更新研究的相关文献进行分析。[结果]该...[目的]为未来开展森林生态系统恢复和经营管理提供参考依据。[方法]基于Web of Science和中国知网数据库,通过可视化文献分析工具CiteSpace,对2000至2021年全球已发表的有关森林生态系统植被自然更新研究的相关文献进行分析。[结果]该领域的历年发文量呈波动上升趋势,美国、巴西、加拿大的发文量排在全球前列,在国际间保持着紧密的合作关系。国内发文量远低于国外,增长趋势缓慢且相关研究起步较晚,国际影响力较弱,与森林资源丰富的国家相比具有明显差距。国外以ZHU J J、KAREN D H、DANIEL C D等为核心作者形成的研究团队引领着该领域的发展。国内多以科研院所形成的团队内部合作为主。生态类期刊是该研究领域学术成果展示的重要平台,《Forest Ecology and Management》期刊收录的相关文献最多,国内核心期刊发文量处在第一位的是《生态学杂志》。目前国内外对森林植被自然更新影响因素的研究多分布在光照或林窗动态、种子库或种子雨、火烧、水分、人为干扰等方面。探究林隙/林窗、土壤、火、种子特性的影响机制是该领域近几十年的研究热点。[结论]气候变暖引起的夏季极端干旱以及人类对土地的不合理利用造成的植被更新障碍问题成为全球在该领域的新兴研究前沿。展开更多
文摘A renovation project of miniaturization and high efficiency is provided for the hot blast stove .The experimental data tested feasibility of the new-type swirl flow hot blast stove. The normal and hot state experiments have been done through changing the angle of gas entering into the regenerator. Factors influencing pressure drop have been studied and analyzed. The experimental results can be formulated in the form of the Ergun equation. The regression equation is obtained. And two modified coefficients are offered to the regenerator pressure drop of the new-type swirl flow hot blast stove.
文摘再生器是溶液除湿系统中的关键部件之一,提高再生器综合性能是解决极端热湿气候区高湿问题的有效手段。将指标相关法(CRITIC,Criteria Importance Through Intercriteria Correlation)和优劣解距离法(TOPSIS,Technique for Order Preference by Similarity to Ideal Solution)联合,建立CRITIC-TOPSIS模型,用于再生器运行入口参数(空气质量流量、溶液质量流量、温度)的选择评价。以永暑岛礁地区为例,通过再生器处理模型得到基础数据以及4个指标的评价体系,采用CRITIC法求得权重后使用TOPSIS法对220种运行入口参数的组合方案进行评价得到最优解。结果表明,空气质量流量为0.1 kg/s、溶液质量流量为0.3 kg/s、溶液温度为56℃时得分0.885,为永暑地区再生器综合性能最优解;再生量指标的权重为0.4,可作为永暑地区再生器综合性能的代表性指标。
基金the Ministry of Science and Technology of China under the Grant No. G2005CB221203the Natural Science Foundation of China under Contract No. 20576087.
文摘Advanced integrated gasification combined cycle （IGCC） power generation systems require the development of high-temperature, regenerable desulfurization sorbents, which are capable of removing hydrogen sulfide from coal gasifier gas to very low levels. In this paper, zinc ferrites prepared by co-precipitation were identified as a novel coal gas desulfurization sorbent at high temperature. Preparation of zinc ferrite and effects of binders on pore volume, strength and desulfurization efficiency of zinc ferrite desulfurizer were studied. Moreover, the behavior of zinc ferrite sorbent during desulfurization and regeneration under the temperature range of 350-400 ℃ are investigated. Effects of binders on the pore volume, mechanical strength and desulfurization efficiency of zinc ferrite sorbents indicated that the addition of kaolinite to zinc ferrite desulfurizer seems to be superior to other binders under the experimental conditions.
文摘[目的]为未来开展森林生态系统恢复和经营管理提供参考依据。[方法]基于Web of Science和中国知网数据库,通过可视化文献分析工具CiteSpace,对2000至2021年全球已发表的有关森林生态系统植被自然更新研究的相关文献进行分析。[结果]该领域的历年发文量呈波动上升趋势,美国、巴西、加拿大的发文量排在全球前列,在国际间保持着紧密的合作关系。国内发文量远低于国外,增长趋势缓慢且相关研究起步较晚,国际影响力较弱,与森林资源丰富的国家相比具有明显差距。国外以ZHU J J、KAREN D H、DANIEL C D等为核心作者形成的研究团队引领着该领域的发展。国内多以科研院所形成的团队内部合作为主。生态类期刊是该研究领域学术成果展示的重要平台,《Forest Ecology and Management》期刊收录的相关文献最多,国内核心期刊发文量处在第一位的是《生态学杂志》。目前国内外对森林植被自然更新影响因素的研究多分布在光照或林窗动态、种子库或种子雨、火烧、水分、人为干扰等方面。探究林隙/林窗、土壤、火、种子特性的影响机制是该领域近几十年的研究热点。[结论]气候变暖引起的夏季极端干旱以及人类对土地的不合理利用造成的植被更新障碍问题成为全球在该领域的新兴研究前沿。
