查询词典 gas coal

Basing on the theory of two-phase flow of gas and solid, and the characteristics of coal mine driving working face , using the discrete phase models of computational fluid mechanics to simulate the dust concentration during the ventilation process of coal drift driving with exhaust ventilation.

根据气固两相流理论，针对矿井掘进工作面的特点，采用计算流体力学的离散相模型对掘进工作面通风过程中粉尘浓度进行数值模拟，总结抽出式通风掘进巷道中粉尘浓度的沿程分布及变化规律。

For the purpose of investigating the ignition and flame stability of low volatile pulverized coal , an in-depth analysis has been made on the lean flammability limits of gas-phase and pulverized coal combustion.

为了研究低挥发分煤粉着火与火焰稳定性，分析了气相燃烧与煤粉燃烧的着火贫限，提出了低挥发分煤粉着火的一次风粉气分离原则。

It is proposed that in the face of the increasingly severe regulations for environment protection,they were able to reinforce the investment and combined investigations with the relative organizations in the conversion and cleaning technologies of coals, concentration and conversion of coal seam gas, coarse and deep processing of coal gangues so as to enhance...

提出要主动应对日益严格的环境法规，煤炭行业可通过加强煤转化、洁净煤技术、煤层瓦斯纯化和转化、煤矸石粗放与深度加工等方面的投入和联合研究，来提高燃煤产品质量，扩大煤的燃料和非燃料应用领域，降低煤开采综合成本，从而改善整个煤炭行业的经济效益。

One of the methods to make possible the reclamation of coal-based products today is to turn coal into gas and coke .

今天，可能回收煤的副产品的方法之一是把煤变为煤气和焦碳。行销全球的可乐。

The developmental and variable rules of heat value for coal gas of underground gasification without shaft style in steep coal seam is described.

指出了急倾斜煤层无井式地下气化煤气热值的发展变化规律。

The developmental and variable rules of heat value for coal gas of underground gasification without shaft style in steep coal seam is described.

笔者与江苏煤炭工业公司合作，在徐州马庄煤矿进行了煤炭地下气化试验，研究了急倾斜煤层无井式地下气化的技术工艺，取得了比较满意的效果。

It indicates that the molecule of petroleum coke contains larger amount of ringed structures and much less side-chain than coal by analysis of the tar and gas from petroleum coke pyrolysis and coal.

分析了石油焦热解气体成分，并把它与几种煤的热解气体成分进行比较，从微观角度预示了石油焦分子主要为环状结构，并且所带的侧链较少。

The invention makes full use of sulphur in the high-sulphur coal and the coal gangue to produce stable SO2 with high concentration and provides qualified feed gas for acid-making technique; calcium sulfate is reduced and decomposed to obtain calcium oxide slag which is taken as raw material for producing cement.

本发明充分利用了高硫煤和煤矸石中的硫，产生稳定高浓度的SO 2 ，为制酸工艺提供合格的原料气，硫酸钙还原分解后的氧化钙渣作为制水泥生产的原料。

The invention relates to a method for adopting a compound reducing agent to reduce and decompose phosphogypsum; the method comprises the following steps of: using high-sulphur coal and coal gangue to prepare the compound reducing agent; utilizing tail gas to dry the phosphogypsum and the compound reducing agent which are ground and mixed evenly and then transferred into a reducing and decomposing furnace; carrying out reduction and decomposition till the reaction is completed.

本发明涉及一种采用复合还原剂还原分解磷石膏的方法，该方法将高硫煤和煤矸石配成复合还原剂，再将磷石膏、复合还原剂利用尾气烘干、磨细后混匀送入还原分解炉，进行还原分解，直至反应完全。

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。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。