1) pulverized coal air flow
煤粉气流
1.
A more accurate one-dimensional turbulent ignition model of pulverized coal air flow in a tube was established on the basis of the one-dimensional plane laminar flow ignition model.
在一维平面层流煤粉气流着火的数学模型的基础上,发展了一种更加逼近工程实际 的一维平面紊流煤粉气流着火模型。
2.
Analysed the various methods of oil-free ignition that are used in pulverized coal fired boilers nowadays in the world, and for the first time it brings out the idea that the pulverized coal air flow might be ignited by high-temperature air.
分析了当今国内外电站煤粉锅炉的无油点火技术,提出了利用高温空气点燃煤粉气流的设想。
3.
In this paper,a one-dimensional turbulent ignition model of the pulverized coal air flow in a bube is established on the basis of the one-dimensional plane laminar flow ignition model.
在一维平面层流煤粉气流着火模型的基础上,提出了一种一维平面紊流煤粉气流的着火模型。
3) Dry feed entrained flow bed
干煤粉气流床
4) the pulverized coal stage combustion
煤粉气流分步燃烧
5) gas dust
煤气粉尘
1.
The installation of fine dust on-line monitoring equipment in the BF gas dust-removing system and the entrance pipes of TRT unit can efficiently control the efficacy of dust bags and realize the on-line detecting of gas dust content in TRT unit entrance pipes,thus ensuring the running conditions of TRT unit and its long-term, high-efficient and safe running.
在高炉煤气除尘系统和TRT机组入口管道上安装粉尘在线监测装置,可对气布袋除尘效果进行有效控制,并实现TRT机组入口管道煤气粉尘含量的在线检测。
2.
The initiation of the cracks was caused by stress corrosion resulting from the co-effect of the corrosive gas dust and the axial tensile stress.
表面裂纹萌生原因是拉杆在腐蚀性高炉煤气粉尘和轴向拉伸等工作应力的综合作用下,形成的应力腐蚀裂纹。
3.
Installation of dust on-line monitor device in the dusting system of blast furnace gas and in inlet pipe of TRT set could effectively control cloth-bag dusting effect and realize on-line examination of gas dust content in the inlet pipe of TRT set.
在高炉煤气除尘系统和TRT机组入口管道上安装粉尘在线监测装置,可对气布袋除尘效果进行有效控制,并实现TRT机组入口管道煤气粉尘含量的在线检测。
6) coal powder gasification
粉煤气化
1.
The company of chemical fertilizer that raw materials depond on the anthracite coal or carbon must take the advanced technology of coal powder gasification of rich oxygen gasification and turn the resources of native bad quality coal to advantage,declining the cost the synthesis ammonia,and then it can exsisting and develop.
对于以无烟煤或焦炭为原料的生产企业 ,要加快推广粉煤气化、富集连续气化等先进技术 ,充分利用当地劣质煤资源 ,从根本上降低合成氨成本 ,为企业的生存发展创造有利条件。
补充资料:低NO_x煤粉燃烧器
低NO_x煤粉燃烧器
low NO_x pulverized-coal burner
(1 iN()[11、、一f、一、一:一、11:一,‘一i低NO二煤粉燃烧器(low NOJ pulverized一eoalburner)能降低和抑制NO,生成的煤粉燃烧器。低N认煤粉燃烧器通过特殊的结构设计,采用空气分级(见空气分级)、燃料分级(见二次燃料再燃烧)、浓淡燃烧和烟气再循环等技术措施,尽可能地降低燃烧区的氧浓度和火焰的峰值温度,减少在高温区的停留时间,抑制NO,的生成,或使已生成的NO,在下游区域还原成NZ。其中空气分级是应用最广.比较成熟的低NO,技术。现有电站锅炉上采用的低NO,燃烧器的结构型式很多,随着制造厂的不同而有较大的差异,但基本原理类同。 双调风旋流燃烧器将二次风分成内二次风和外二次风两股气流,通过调风器和旋流叶片分别控制各NO,的生成,见图5。二次空气SGR一孟二次空气一次空气二次空气S口砚一二次空气 图5 SGR燃烧器 对于采用低NO,嫩烧器的锅炉,除燃用贫煤和无烟煤的以外,经过燃烧优化调整后,通常均可使NO,的排放量低于650 mg/m3(02=6%)(液态排渣锅炉NO,的排放量可能会比较高)。对于已有锅炉改用低NO二燃烧器时,因燃烧推迟而有可能会使效率降低一些。自的风量和旋流强度,以调节一、二次风的混合,使其在燃烧器出口附近的火焰根部形成缺氧富燃料区,使燃烧推迟,火焰温度降低,NO,的生成量减少,在下游形成富氧的燃尽区,保证燃料的完全燃烧,见图1。外二次风调风俗 ┌─┐ ┌────────┤川│ │l/沪. │ │ └────────┤ │┌─────────┤ ││一仁业班丛旦止罕生│ │└─────────┴─┘点火油枪次风+煤粉或烟气 图1双调风旋流燃烧器 低NO,直流燃烧器将80%左右的燃烧空气送人主燃烧器,在主燃烧器区域形成缺氧富燃料的工况,降低火焰峰值温度,既减少NO二的生成,又有可能使已生成的NO,还原成氮分子(NZ).从而减少NO二的排放量。而在主燃烧器的顶部设置燃尽风OFA,将剩余的空气由此送人炉膛,使未完全燃烧产物燃尽.见图2。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条