三甘醇水溶液池沸腾传热

Boiling of water/triethyleneglycol (TEG) binary solution has a wide-ranging application in the gas processing engineering. Design, operation and optimization of the involved boilers require accurate prediction of boiling heat transfer coefficient between surface and solution. In this investigation, nucleate pool boiling heat transfer coef-ficient has been experimentally measured on a horizontal rod heater in water/TEG binary solutions in a wide range of concentrations and heat fluxes under ambient condition. The present experimental data are correlated using major existing correlations. In addition a correlation is presented for prediction of pool boiling heat transfer for the system in which the vapour pressure of one component is negligible. This model is based on the mass transfer rate equation for prediction of the concentration at the bubble vapor/liquid interface. Based on this prediction, the temperature of the interface and accordingly, the boiling heat transfer coefficient could be straightforwardly calculated from the known concentration at the interface. It is shown that this simple model has sufficient accuracy and is acceptable below the medium concentrations of TEG when the vapor equilibrium concentration of TEG is almost zero. The presented model excludes any tuning parameter and requires very few physical properties to apply.     

Thermal Safety Study on TEGDN/NG/NC Gun Propellant

The self-accelerating decomposition temperature (T_SADT), critical temperature of thermal explosion (T_b), adiabatic time to explosion (t_TIad), 50% drop height of impact sensitivity (H₅₀), critical temperature of hot spot initiation caused by impact (T_cr,hotspot), safety degree (S_d), critical thermal explosion ambient temperature (T_acr), and thermal explosion probability (P_TE) of the gun propellant composed of triethyleneglycol dinitrate (TEGDN), nitroglycerin (NG), and nitrocellulose (NC) were studied. The results of thermal safety evaluation on the gun propellant were obtained: (1) T₀₀ = 433.4 K, T_SADT = T_e0 = 441.1 K, T_b = T_bp0 = 468.4 K; (2) when E_k = 205.3 × 10³ J mol ^?1 and A_k = 10^20.62 s ^?1, t_TIad = 48.3 s, H₅₀ = 17.93 cm, T_{cr, hotspot} = 634.9 K; for a sphere sample, T_S(T)max  = 369.0K, T_acr = 364.2 K, S_d = 65.03%, P_TE = 34.96%.     

气相色谱测定三甘醇混合物的研究

研究了用气相色谱仪测定三甘醇混合物中三甘醇含量的方法 ,分为归一法和内标法。如果三甘醇混合物样品含水量甚微 ,以及各组分都能在色谱图上出峰显示 ,则用归一法能测得三甘醇含量的准确结果。如果三甘醇混合物样品中含有一定量的水以及四甘醇等高沸物 ,则用 1 ,4丁二醇为内标 ,运用内标法能准确测定三甘醇含量     

Sorption of binary liquid mixtures in methacrylate‐based biomaterials; Simultaneous determination of the diffusion coefficients and the uptake fraction at equilibrium of the components of ethanol‐water mixtures by a new iterative method

The present investigation is concerned with the development of a new iterative method permitting, for a Fickian sorption of a binary liquid mixture in thin polymer sheets, the simultaneous determination of the self‐diffusion coefficients of the components of the mixture, and their uptake fractions at equilibrium. The approach is based on a new equation describing a parallel Fickian sorption of the components of the mixture into thin polymer sheets. The procedure was tested with ideal and Monte Carlo simulated data. The method, applied to ideal simulated data that corresponded to various values of D₁, D₂ and f, perfectly extracted the desired parameters. The application of the method to Monte Carlo simulated data revealed that this method is fairly applicable even when the simulated data are considerably obscured by “noise”. Finally, the proposed method was successfully applied to the experimental data concerning the sorption kinetics of ethanol–water mixture (75 vol % in EtOH) at 37°C in thin polymeric sheets of triethyleneglycol dimethacrylate (TEGDMA). © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2008     

三甘醇脱水装置运行常见问题分析及处理对策

在脱水装置的实际操作运行中发现,过高的地层水矿化度及化排剂使用不当常常导致装置出现运行故障甚至停车,影响生产的正常运行。主要论述了三甘醇脱水装置在运行过程中出现故障的表现形式及常见问题,深入分析了出现问题的原因并提出相应的处理对策及预防措施,对三甘醇脱水装置的稳定生产运行具有良好的借鉴意义。     

撬装天然气脱水装置运行中常见问题分析及对策

三甘醇因其具热稳定性好、吸水性强、蒸汽压低等优点,作为天然气脱水溶剂得到了广泛的应用。本文根据撬装三甘醇脱水装置的脱水原理及工艺流程,结合装置运行过程中出现的问题,通过分析和研究,提出了相应的预防或解决措施。     

含能增塑剂 LD-70 增塑的硝化棉体系性能研究

利用光学显微干涉法、示差扫描量热法和计算法对含能增塑剂ＬＤ－７０增塑的硝化棉体系相容性及结构转变进行了研究．得到了体系相图，并观察到有两个相转变温度：低温转变和高温转变．