新疆煤矿区瓦斯抽采利用技术现状及展望

新疆煤炭及瓦斯资源丰富,是我国能源战略后备基地和煤炭生产力西移的重要承接区,但煤矿瓦斯抽采利用规模小、技术水平低,与其煤炭开采量极不匹配。通过对国内外煤矿瓦斯抽采、利用技术领域科学研究与工业应用进展的调研分析,根据不同浓度瓦斯的利用技术差异,将瓦斯浓度更科学地精确划分为5级。新疆煤矿区产出瓦斯主要为乏风瓦斯、巷道瓦斯钻孔抽采的特低-低浓度瓦斯,乏风瓦斯的科学利用技术方向为蓄热氧化发电,而钻孔抽采瓦斯因其地域的不同存在瓦斯浓度的差异,库拜、阜康、艾维尔沟等地区的低浓度瓦斯适宜燃气内燃机发电,其他矿区的特低-低浓度瓦斯适宜作为掺混气源与乏风掺混后蓄热氧化发电。对瓦斯抽采利用的瓦斯治理需求与严峻环保形势进行剖析,借鉴国内高阶煤地区成熟的瓦斯治理模式,根据新疆急倾斜、侏罗系中低煤阶地质条件下的瓦斯赋存与产出特点分析,建立了适用于新疆各主要煤矿区的"浅部采煤、深部排水采气,中部采空区卸压影响带抽采煤系气"的立体抽采模式,提出通过三维地质建模手段实现采煤、采气、排水过程的动态管理,优化采煤、采气的合理时序,为新疆煤矿区的瓦斯综合抽采利用提出技术方向、抽采模式等科学建议。     

煤矿低浓度瓦斯发电技术的应用

根据我国煤矿目前的瓦斯治理利用技术的现状,介绍了目前我国燃气轮机发电、内燃机发电、催化氧化发电等主要的瓦斯发电技术。针对目前低浓度瓦斯难以有效利用的问题进行了技术研究,采用特殊的输气系统,对抽采抽放系统进行了优化,保证了燃烧的稳定性。最后就目前瓦斯发电方面需要做出的改进进行了讨论,对以后的发展提出了设想。     

低浓度瓦斯发电气体预处理技术研究

 基于国内煤矿瓦斯抽采条件限制，抽采瓦斯浓度普遍较低，因此煤矿瓦斯发电多为低浓度瓦斯发电机组。由于低浓度瓦斯特性和抽放站条件限制，目前低浓度瓦斯普遍没有进行预处理，进入瓦斯发电机组的瓦斯品质较差，严重影响瓦斯发电机组运行稳定性、可靠性、经济性。为了改善机组运行状况，低浓度瓦斯应进行预处理。本文提出了低浓度瓦斯进行预处理的几项技术措施，并进行了综合性技术经济分析，为低浓度瓦斯发电建设提供参考性意见。     

瓦斯发电技术在大湾煤矿的应用

利用矿井抽采瓦斯进行发电,是目前矿井最有前途的瓦斯开发项目之一。大湾煤矿自2004年应用瓦斯发电技术以来,取得了明显的经济效益和社会效益。通过对大湾煤矿高、低浓度瓦斯发电技术原理、安全性、经济效益等方面的阐述,以期瓦斯发电技术进一步得到推广应用,并达到矿井瓦斯以用促抽,以抽促治理的目的。     

我国煤矿低浓度瓦斯利用技术研究现状及前景展望

介绍了我国煤矿抽采瓦斯利用存在的问题和煤矿低浓度瓦斯利用的主要技术途径,详细分析了煤矿低浓度瓦斯利用技术的研究现状,并对今后的利用前景进行了客观展望。     

瓦斯发电技术在大湾煤矿的应用

利用矿井抽采瓦斯进行发电，是目前矿井最有前途的瓦斯开发项目之一。大湾煤矿自2004年应用瓦斯发电技术以来，取得了明显的经济效益和社会效益。通过对大湾煤矿高、低浓度瓦斯发电技术原理、安全性、经济效益等方面的阐述，以期瓦斯发电技术进一步得到推广应用，并达到矿井瓦斯以用促抽，以抽促治理的目的。     

低浓度瓦斯综合利用技术研究

依据万峰煤矿瓦斯特点,利用现有基础设施,对低浓度瓦斯进行综合利用。矿井用低浓度瓦斯进行发电过程中,采用细水雾输送系统,保证了低浓度瓦斯的输送安全,对抽采系统与抽采方法进行优化,保证了气源的稳定性,同时利用瓦斯发电余热向水源热泵提供热源,保证了矿井供暖需要。低浓度瓦斯的综合利用不仅减少了直接排空造成的环境污染,也为矿井节约了用电费用,同时可以以用促抽、以抽保用,有利于矿井安全生产。     

煤矿瓦斯氧化利用安全保障系统设计与应用

根据瓦斯氧化装置的运行特点,结合我国煤矿井下通风要求和矿井瓦斯抽采现状,分析了煤矿瓦斯氧化装置运行中存在的主要安全隐患,提出了在抽采瓦斯与矿井乏风掺混、抽采瓦斯输送等主要环节的安全保障技术要求。介绍了矿井乏风与低浓度瓦斯混配装置、混配监控系统、瓦斯抽采泵站安全保障系统设计情况,在高河煤矿瓦斯氧化发电工程运行期间的测试结果表明,设计完善的低浓度瓦斯输送安全保障系统及掺混监控系统,可以有效保证瓦斯氧化装置的安全高效运行,不会给瓦斯抽采系统及矿井的安全生产带来隐患。     

夹河矿低浓度瓦斯安全抽采及发电利用技术研究

对夹河煤矿低浓度瓦斯抽采的必要性和可行性进行了分析,根据矿井开采实际,选择了高位钻孔、上隅角插管和采空区埋管等综合抽采技术,保证了矿井安全开采,并为瓦斯发电提供了充足的气源.通过瓦斯发电机组稳定、安全、高效运行发电并网及热能综合利用,达到了经济、环境和社会多重效应,实现了江苏省瓦斯治理综合利用零的突破.     

煤矿低浓度瓦斯直接焚烧余热制冷技术在煤矿热害治理领域的探索

对我国煤矿热害防治问题和抽采瓦斯利用情况进行了分析,重点介绍了煤矿低浓度瓦斯直接安全焚烧技术。将瓦斯安全利用与热害治理相结合,提出了煤矿低浓度瓦斯直接焚烧余热制冷技术。阐述了低浓度瓦斯直接焚烧余热制冷系统的组成,并分析了其经济和社会效益。煤矿低浓度瓦斯直接焚烧余热制冷技术利用瓦斯焚烧高温余热作为热源,采用溴化锂吸收式制冷,既节约了电能的消耗,又减少了温室气体的排放,是一种可持续发展的热害治理新模式。     

Current situation and future trend of China rare earth luminescent materialindustry(continued)

<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared