1) composite combustion with powdered coal
![点击朗读](/dictall/images/read.gif)
煤粉复合燃烧
1.
According to the data from investigation and collection, the effect of laminatedcombustion and composite combustion with powdered coal for chain - grate stoker are expound-ed, also discussed the problems of application.
依据调查及测试数据,阐述链条炉排分层燃烧及煤粉复合燃烧技术的效果,探讨其应用方面的技术问题。
2) pulverized coal combustion
![点击朗读](/dictall/images/read.gif)
煤粉燃烧
1.
Numerical simulation of a pulverized coal combustion two-phase flow;
![点击朗读](/dictall/images/read.gif)
煤粉燃烧两相流的数值模拟
2.
Based on Eulerian treatment of gas phase,Eulerian treatment of particle continuum and momentum equations,as well as Lagrangian treatment of particle energy and mass transport equations,a three-dimensional mathematical model of turbulent gas-particle two-phase flow and pulverized coal combustion is formulated in the raceway of blast furnace.
基于欧拉气相方程组、欧拉颗粒连续方程和动量方程以及拉氏颗粒能量和质量变化方程,建立并发展了高炉风口回旋区湍流气固两相流动和煤粉燃烧的三维数学模型。
3.
Three kinds of coal differed from fineness were burned in a laboratory-scale drop tube furnace for combustion test,and an 8-stage Andersen particle impactor was employed for sampling the primary particulate matter(PM),in order to study coal fineness effect on primary PM features during pulverized coal combustion.
研究煤粉细度对煤粉燃烧后一次颗粒物特性的影响。
3) coal combustion
![点击朗读](/dictall/images/read.gif)
煤粉燃烧
1.
Research progress of fractal for coal combustion;
![点击朗读](/dictall/images/read.gif)
分形在煤粉燃烧中的研究进展
2.
Research progress in low N0_x emission control of coal combustion at home and abroad;
![点击朗读](/dictall/images/read.gif)
国内外煤粉燃烧低NO_x控制技术的研究现状
3.
Simulation of 3-D gas-particle flows and coal combustion in a tangentially-fired furnace model using a two-fluid-trajectory model;
用双流体轨道模型模拟四角喷燃模型炉内三维湍流两相流动和煤粉燃烧
5) pulverized coal combustion
![点击朗读](/dictall/images/read.gif)
粉煤燃烧
1.
Research of formation mechanism of submicron particles in pulverized coal combustion;
![点击朗读](/dictall/images/read.gif)
粉煤燃烧过程中细粒子形成机理的研究
6) gas pulverized coal fires boiler
![点击朗读](/dictall/images/read.gif)
煤气煤粉混合燃烧锅炉
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