甘醇法脱水吸收塔设计及核算方法研究

发布时间：2019-05-27 14:44

【摘要】：脱水吸收塔是甘醇法脱水工艺系统的核心设备,脱水吸收塔的性能直接影响脱水工艺系统的处理能力、生产质量及能耗定额。吸收塔设计及核算过程繁琐、计算量大,应用辅助软件可以大幅提高吸收塔工艺设计效率及计算精度。国内、外现有的塔器设计软件尚存在一些缺陷,如操作版本低、普适性差、功能不足等。本论文以甘醇法脱水工艺中常用的板式吸收塔为主要研究对象,从工艺结构设计、流体力学核算和塔体强度设计校核三个角度出发,主要研究工作如下： (1)跟踪与检索国内、外甘醇法脱水工艺设计、吸收塔设计与优化技术及相关领域最新进展,调研国内、外塔设备设计辅助软件的功能特点、适用范围及研发趋势。 (2)归纳、总结天然气含水量公式化计算方法,评价不同公式的适用范围。研究甘醇溶液物性参数,确定贫甘醇浓度及循环量的计算方法。 (3)完成脱水吸收塔塔体、溢流区、开孔区、降液装置、气液接触元件等工艺设计方法研究,提出塔板面积分配方案及气液接触元件排布策略,确定脱水吸收塔工艺设计流程。 (4)研究泡罩塔板、浮阀塔板和筛孔塔板的水力参数核算方法,核算内容包括干板压降、液层阻力、降液管液泛、雾沫夹带液泛等,提出三类塔板的操作弹性界定方法,给出四种情况下的吸收塔水力学参数调优步骤。 (5)采用平面假设分析脱水吸收塔自振特性,推导出吸收塔自振周期计算公式,研究基本振型影响下吸收塔所受地震载荷、地震弯矩、风载荷以及风弯矩的计算方法,确定塔体承载强度和稳定性校核指标。利用实梁法和虚梁法研究六种作用力影响下的塔顶挠度计算公式。分析相同承载条件下塔径及塔高对塔顶挠度的影响程度,提出吸收塔塔顶挠度控制范围。 (6)基于Microsoft Visual Studio2010平台C#编程语言,开发甘醇法脱水吸收塔设计及核算辅助软件TDT-Design,实现脱水吸收塔工艺设计、水力核算、强度设计及稳定性校核等功能。软件具有良好的输入、输出功能,操作方面,界面美观,计算结果可靠,普适性强。 (7)利用以上研究成果及TDT-Design软件,设计并核算气田A三甘醇脱水工艺系统中的脱水吸收塔,该塔操作性能稳定,能够满足气田A生产工艺需求。
[Abstract]:The dehydration absorption tower is the core equipment of the ethylene glycol method dehydration process system, and the performance of the dehydration absorption tower directly influences the processing capacity, the production quality and the energy consumption quota of the dehydration process system. The design and accounting process of the absorption tower is complicated, the calculation amount is large, and the application auxiliary software can greatly improve the process design efficiency and the calculation accuracy of the absorption tower. In China, other existing tower design software is still in some defects, such as low operation version, poor universality, insufficient function, etc. In this paper, the main research object of the plate-type absorption tower, which is commonly used in the dehydration process of the glycol method, is based on the process design, fluid mechanics accounting and the design of the strength of the tower body. The main research work is as follows: (1) Tracing and retrieving the dehydration process of domestic and external glycol method The design and optimization technology of the absorption tower and the latest progress in the relevant fields, the functional characteristics, the scope of application and the research and development trend of the auxiliary software for the equipment design of the domestic and external tower are investigated. Potential. (2) Induction, summary of the formulation of natural gas water content, and the evaluation of different formulas. The range is used to study the physical parameters of the diethylene glycol solution to determine the concentration of the lean-glycol and the amount of the cycle. (3) The process design method of the tower body, the overflow area, the opening area, the down-flow device and the gas-liquid contact element of the dehydration absorption tower is completed, the area distribution scheme of the tray and the arrangement strategy of the gas-liquid contact element are proposed, and the work of the dehydration absorption tower is determined. (4) The method for calculating the hydraulic parameters of the bubble column plate, the float valve tray and the sieve tray is studied. The accounting contents include the pressure drop of the dry plate, the resistance of the liquid layer, the flooding of the downcomer, the flooding of the mist and the like, and the operation of the three types of trays is proposed. The water power of the absorption tower in four cases is given as the elastic defining method. (5) Using the plane hypothesis to analyze the natural vibration characteristics of the dehydration absorption tower, the calculation formula of the natural period of the absorption tower is derived, and the seismic load, the earthquake bending moment and the wind load of the absorption tower under the influence of the basic vibration mode are studied. And the bearing strength of the tower body is determined. The check index of degree and stability. Under the influence of six forces by using the solid beam method and the virtual beam method, The calculation formula of the tower top deflection is analyzed. The influence of the tower diameter and tower height on the tower top deflection under the same bearing condition is analyzed, and the absorption is proposed. The control range of the tower top deflection. (6) Based on the C # programming language of the Microsoft Visual Studio 2010 platform, the design and accounting auxiliary software TDT-Design of the dehydration absorption tower of the glycol method is developed to realize the process design, hydraulic calculation and strength of the dehydration absorption tower. The software has good input, output function and operation, and the interface is beautiful. and (7) using the above research results and the TDT-Design software to design and calculate the dehydration absorption tower in the gas field A triethylene glycol dehydration process system, the operation performance of the tower is stable,
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE962

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