Characterization of pressure signals in fluidized beds loaded with large particles using wigner distribution analysis : feasibility of diagnosis of agglomeration 基于魏格纳分布的鼓泡流化床中结焦早期诊断
A dynamic catalyst coking model and multi - variant linear regression model are used to estimate the parameters of catalyst coking model 提出了采用动态结焦模型以及新鲜催化剂结焦速率的线性回归模型来估计结焦模型参数的方法。
The experimentation of cool and hot diagnosis reflected the structure and disposal of combustor , slag bonding and smirch of hearth are the main factors of hearth ' s outlet overheat and output of boiler decline 冷、热态诊断试验反映出炉膛结焦、粘污及燃烧器的结构和布置等因素是造成炉膛出口烟温偏高，锅炉出力下降的主要因素。
Finally , some problems met in the induction - heating free - oil ignition technology of pc , such as cokeability and ignition of low volatile coal , are analyzed and discussed . this broadens the way for further research 最后，本文对感应加热煤粉无油点火中存在的结焦问题和低挥发份煤种的点燃问题进行分析和讨论，为今后的研究积累了经验、开拓了思路。
The lumping scheme and reaction network of this model largely decrease the complexity of model and demand for detailed component analysis , so it is easy to apply this model to the commercial units . the catalyst coking model with average activation function of catalyst is presented 深入探讨了重整催化剂的结焦失活机理，首次提出了连续重整装置催化剂失活的平均活性函数概念，给出了催化剂结焦失活模型。
This article aims at the boiler ' s problems in operation : 1 ) under nominal load , the smoke temperature at the outlet of hearth reaches 1200 , far more exceeds 1050 the original designed temperature . this will always result in slag inside boiler and the temperature of overheater ' s pipe superheat , so that boiler cannot take nominal load and all these influence boiler ' s nomal operation heavily , 2 ) this article also studied the reason why the assistant oil becoming necessary when coal changes . during the nomal operation , many factors ( makeup of combustor and its disposal , smirch and encrust of water wall , excessive air coefficient , temperature of primary air , coal type and density of coal dust ) can deviate the designed working conditions , then affect the boiler ' s nomal operation 本文针对该锅炉在实际运行中存在的问题：在额定负荷下，炉膛出口超温、低温段过热器前烟温高达936 ，远远超过815的设计值；喷燃器四周水冷壁结焦严重，过热器管壁温度超标，无法带上额定负荷；甚至有时因燃煤质量的变化，必须投油助燃的严重情况进行了分析研究。在实际生产过程中，燃烧器的结构、布置，水冷壁的粘污、结垢，过剩空气系数、一次风温、煤种及其浓度变化等许多因素都会偏离锅炉的设计工况，从而影响炉内的传热和燃烧，造成炉膛出口超温、水冷壁结渣等问题。
The extremely harsh working conditions directly result in high thermal and mechanical loads in diesel engines " piston assemblies , and so due to high stress it becomes one of the most vulnerable components assembly in diesel engine . piston assemblies " failures such as cylinder sticking , scoring , gumming , etc . , greatly limit diesel engines " durability and reliability 由于长期工作在恶劣的环境下，柴油机活塞组要承受很高的热负荷和机械负荷，这些负荷所产生的高综合应力影响了它的使用寿命，其可能导致的咬缸、拉缸、结焦等故障极大地危害了柴油机整机的耐久性和可靠性。
Moreover , the system of powdered coal conveying with primary air is the most important tache , whether the distribution of primary air is even or not directly relates to whether the distribution of powdered coal is even or not in all firing implement and nozzles , sequentially directly relates to whether it is hard to take fire , whether the fire is stable , whether there is coking and how about the heat efficiency of the boiler , hi addition , if there is jamming and deflagrate in the system of powdered coal conveying with primary air , severe safety accident can be resulted 良好的煤粉配风是建立合理的炉内空气动力工况和稳定燃烧的必要条件。而其中一次热风送粉系统又是最重要的一个环节，一次风配风是否均匀直接关系到煤粉在各燃烧器和各喷嘴中的分布是否均匀，从而直接关系到着火是否困难、火焰是否稳定、局部是否结焦以及锅炉的热效率高低。若一次风送粉系统发生堵塞和煤粉爆燃则可能引发严重的安全事故。
Abstract : establishment of the macro dynamic mathematical models for coked zeolite catalyst coke burning regeneration was discussed from an engineering point of view . based on the modified particle - pellet model , dynamic mathematical equations for porous and nonporous catalyst coke burning regeneration were deduced , supplying a theoretical basis for computer simulation of coked zeolite catalyst regeneration 文摘:从反应工程学的角度讨论了结焦沸石催化剂烧焦再生反应宏观动力学数学模型的建立，根据已提出的修正的颗粒-粒子动态等温物理模型，分别推导出了多孔焦炭的燃烧再生阶段数学方程和无孔焦炭的燃烧再生阶段数学方程，为结焦沸石催化剂再生反应过程计算机模拟提供了理论依据。
