查询词典 coal

On the basis of referring the foreign and domestic literatures and systematically generalizing the former research results, firstly, from the adsorption gas, coal spontaneous combustion and the heat resolves, thesis analyzes the ignitable gas occurrence. Secondly, though the experiment station of coal spontaneous combustion, thesis obtains the critical temperature 60 ℃～ 100 ℃, splits temperature 100℃～ 150 ℃, the fission temperature 150℃～ 180 ℃ and the speed-up temperature 210℃～ 250 ℃ and ignitable gas release rules in the several temperatures sections according to the results. Finally according to fire resource and the catastrophe theory, ignitable gas explosion characteristic and the influence factors have been conducted of the qualitative investigation and the quantitative determination. The gas explosion control technologies are put forward. It has built the certain foundation for the effective prevention gas explosion accident occurrence.

本论文采用理论分析和实验模拟相结合的综合研究方法，首先从煤层吸附瓦斯、煤氧复合过程及煤高温热解三方面对采空区可燃性气体的产生进行分析；其次通过对大型煤自然发火实验测试台的应用，根据实验结果得到临界温度60℃～100℃、干裂温度100℃～150℃、裂变温度150℃～180℃和增速温度210℃～250℃等几个温度段的可燃性气体释放规律；最后根据爆炸引火源，结合瓦斯爆炸流变-突变理论，对可燃性气体爆炸特性及影响因素进行了定性研究和定量测定，提出瓦斯爆炸事故的控制对策，为有效预防瓦斯爆炸事故的发生打下了一定的基础。

High pressure pulsed water jet ; low permeability coal seam ; rich gas coal mine ; gas drainage

高压脉冲水射流；低透气性煤层；高瓦斯矿井；瓦斯抽放

The research on coking during the pyrolysis of coal to acetylene in the plasma (1) In the arc plasma jet, different kind of coal has different coking character. The aromatics, colloids, asphaltene and Carbenes are the precursors of the cokes.(2) The mostly reasons of coking in the plasma reaction equipment are the particle size, the feeding velocity, the power of plasma and the structure of equipment.

五、煤等离子体热解制乙炔装置结焦性研究的结果(1)在电弧等离子体射流的条件下，煤种的结焦能力不同，煤中的芳香分、胶质、沥青质和碳青质是结焦前驱体。

In boiler field, proper atomization of high viscosity liquid fuel is the essential assurance to safe .stable and high efficient combustion for boiler; in the propulsion equipment of rockers and turbo jet-propelled engine, the atomization quality of liquid fuel is the precondition to improve combustion efficiency and supply sufficient propulsion; in the field of industrial manufacture, metal powder is made by liquid metal which is impacted by high velocity gas; in the field of agricultural irrigation, the water with certain velocity is used to strike metal disk to make insufflations proportionally to the irrigation field; in the technique of desulphurization and coal gasification, proper design of nozzle is the essential factor to advance the efficiency of desulphurization and coal transformation.

在锅炉领域，高粘度液体燃料的良好雾化是锅炉安全稳定高效燃烧的重要保证；在火箭推进装置、涡轮喷气式发动机中，液体燃料的雾化质量是提高燃烧效率并产生足够推力的前提；在工业生产领域，用高速气流冲击液态金属来制备金属粉末：在农业灌溉中，用一定速度的水流冲击金属圆盘破碎并改变方向实现对灌溉区域的均匀喷洒：在烟气脱硫、煤气化等工艺中，良好的喷嘴设计是提高烟气脱硫效率和碳转化率的重要因素。

We used to have coal furnaces in our basements, my son's turn of the previous century home still has coal dust on all of the floor joists, and we didn't have an epidemic of autism then.

我们使用的有煤火炉，在我们的地下室，我儿子的之交，上个世纪首页仍然有煤尘对所有的楼托梁，和我们没有流行的自闭症。

Power has an adequate built-in area of 330 kilovolts, five 220-kilovolt substations, Longyangxia, salt pot Gorge Power Station are the largest network in our region to the northwest, north around the Yaojie Coal Mining Bureau of the Treasury thermal power generation Plants, Xiangtang, such as hydropower station is being developed, basically forming a water and coal-fired electricity industry chain.

电力充足辖区内建有一座330千伏、五座220千伏变电站、龙羊峡、盐锅峡电站的大网皆经我区输往西北、华北各地，窑街矿务局务质煤火力发电厂，享堂水电站等正在筹建，基本形成了水、煤电产业链。

The product is currently the industry flow, pressure, the largest power pumping stations to meet the large-bore heavy coal mine stent quick movements, pushing wandering and high-yield, high efficiency coal mining needs.

该产品是目前同行业流量、压力、功率最大的泵站，能满足煤矿大缸径重型支架快速升降、推溜和高产、高效采煤的需要。

It has been found that the mercury content has good linear relationship with ash content of coal, it means that the mercury in coal is mainly associated with minerals.

煤炭中的汞含量50%和60%左右：并且发现两个选煤厂中汞含量与灰分有较好的线性相关性，也说明了原煤中汞的赋存与矿物质密切相关。

Water coal slurry is a new type of liquid coal which is developed in recent years and used to replace some oil as in a power station.

水煤浆是近几年发展起来的一种新型液态煤基代油燃料，并成功地用于电站锅炉和炉窑代油燃烧，但是将水煤浆用于中小锅炉代煤燃烧却研究甚少。

Shell is working on clean energy in many different areas in China including coal gasification, coal to liquid s, natural gas, gas to liquid s

壳牌正在中国清洁能源领域进行多方面的努力，其中包括煤气化、煤制油、天然气、天然气制油和可再生能源。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。