双段固定床甲烷化反应器内流场特征研究及反应器强度分析

发布时间：2018-03-22 12:22

本文选题：甲烷化　切入点：甲烷化反应器　出处：《新疆大学》2015年硕士论文　论文类型：学位论文

【摘要】：本文选取Topsoe工艺中的固定床甲烷化反应器为研究对象,由于Topsoe Process中甲烷化反应器分三段,甲烷化主要发生在第一段甲烷化反应器中,因此,本论文主要针对第一段甲烷化反应器进行模拟研究。研究内容围绕甲烷化反应器内部场分布和固定床甲烷化反应器进行。在论文中提及的第一段甲烷化反应器均由甲烷化反应器代替。首先,建立甲烷化反应器流体模型,运用ANSYS-CFX进行流体模拟,确定模拟模型。为了验证模型的正确性,将模拟结果与设计值进行比对,比对结果5%时认为模拟模型是合适的。确定物理模型和模拟模型后,提取温度分布、流速分布及各组分分布矢量图,一方面,可以明确床层中的各量分布情况;另一方面,对结果进行分析,明确床层存在的问题,以便针对存在的问题提出措施。第二,针对反应器存在的问题进行相应的床层结构改变,得到床层结构与甲烷产量的关系,进一步确定既有利于温度均匀分布又能保证甲烷产量的床层结构。第三,对反应器入口工艺参数进行研究,提出当其他参数条件满足设计参数时,入口温度、空速和入口压力的允许操作范围。最后,提取甲烷化反应器内壁面的温度分布、压力分布,通过曲线拟合的方法得到其拟合曲线,将其加载到甲烷化反应器设备上,进行热分析;结合反应器的机械载荷,将热分析结果传递到反应器上,对甲烷化反应器进行热-力耦合分析,保证反应器安全稳定运行。
[Abstract]:In this paper, the fixed bed methanation reactor in Topsoe process is selected as the research object. Because the methanation reactor in Topsoe Process is divided into three stages, methanation mainly occurs in the first stage methanation reactor. In this thesis, the first stage methanation reactor is simulated. The research focuses on the field distribution of the first stage methanation reactor and the fixed bed methanation reactor. The first stage methanation reactor mentioned in the paper is the same as the first stage methanation reactor. Instead of methanation reactors. First, The fluid model of methanation reactor was established, and the simulation model was determined by using ANSYS-CFX. In order to verify the correctness of the model, the simulation results were compared with the designed values. After determining the physical model and the simulation model, we can extract the vector diagram of temperature distribution, velocity distribution and component distribution. On the one hand, we can determine the distribution of each quantity in the bed; on the other hand, The results are analyzed to make clear the problems in the bed, in order to put forward the measures to solve the problems. Secondly, to change the bed structure to get the relationship between the bed structure and methane production. Further determine the bed structure which is favorable to uniform temperature distribution and ensure methane production. Thirdly, the process parameters of reactor inlet are studied, and when other parameters meet the design parameters, the inlet temperature is put forward. Finally, the temperature distribution and pressure distribution of the inner wall of the methanation reactor were extracted, and the fitting curves were obtained by the curve fitting method, and then loaded into the methanation reactor equipment. Combined with the mechanical load of the reactor, the results of thermal analysis are transmitted to the reactor, and the thermo-mechanical coupling analysis of the methanation reactor is carried out to ensure the safe and stable operation of the reactor.
【学位授予单位】：新疆大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE665.3

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