对二氧化碳气体爆破的管理对策研究

基于2017年某地查处的两起涉及CO2气体爆破的案例,分析了CO2气体爆破反映出的问题,总结了CO2气体爆破危害性大、专业性强、涉及面广和欺骗性强等特点,指出了造成这种现象的主要原因,并对CO2气体爆破的安全管理提出了建议。     

高压气体爆破实验系统的研究

该文分析了高压气体爆破的作用机理，介绍了作者自行研制的高压气体爆破实验系统的组成和作用，并对其可行性进行了实验验证。结果表明，这一系统是切实可行的，随着材料强度的提高，破碎介质所需的爆破膜压力呈非线性增长。     

二氧化碳套管式气体冷却器换热性能的实验研究

总结了不同形式CO2气体冷却器的国内外研究现状,对直管、矩形螺旋和圆形螺旋三种套管式气体冷却器性能进行模拟,提出用单位压降换热量来评价超临界条件下气体冷却器的性能,根据模拟结果设计了一套矩形螺旋套管式气体冷却器,实验研究了气体冷却器的CO2入口压力、进水流量和进水温度对气体冷却器传热系数、换热量、COP以及换热器效能等性能的影响。结果表明：当气体冷却器CO2进口压力为8 MPa,进水流量在1.56 kg/min和进水温度在9 ℃时气体冷却器性能较优,系统COP最大可达2.85。研究结果为CO2热泵热水器中的实际应用提供参考。     

膜气体吸收技术脱除电厂烟气二氧化碳的研究进展

介绍了气体分离膜技术、液膜吸收技术和气体吸收膜技术,综述了膜气体吸收技术在减少电厂模拟烟气CO_2排放中的研究状况,并对不同类型的电厂采用不同工艺的经济性进行了比较分析.总结了膜气体吸收技术发展与应用中存在的不足,指出膜气体吸收技术的发展前景.     

二氧化碳气瓶瓶阀爆破片爆破浅析

20 0 1年 2月天津某医院一只二氧化碳气瓶瓶阀爆破片爆破 ,经分析 ,计算确认为低温时充装过量 ,常温时超压引起的并总结了应注意的问题     

激光焊机工作气体对输出功率影响因素探求

介绍CO2激光器工作气体的组成及工作原理,阐述TLF12000t激光器的工作气体组成参数及其杂质气体对激光输出功率的影响。     

高压气体爆破采煤技术的发展及其在我国的应用

本文较为详细地介绍了一种新的采煤方法－高压气体爆破采煤法。该法和传统的烛以采煤方法截然不同，它具有安全可靠，落煤大块率高，生产效率高等优点，因而在我国有着广阔的应用前景。     

井下爆破产生的有害气体及防治措施

介绍了井下爆破产生的有害气体成分及危害,井下有害气体成分对人体危害的极限值。炸药爆炸时有害气体是怎样产生的．找到生成有害气体的原理后,接着说道有害气体的防治措施。防治措施从井下爆破参数的设计、炸药的选择、装药过程和装药质量等进行了介绍。最后有着重强调了通风对防治有害气体中的重要作用。     

二氧化碳相变爆破中的振动信号特征分析

为分析二氧化碳相变爆破产生的振动信号特性在时间上和空间上的衰减规律,通过现场二氧化碳相变爆破试验,分别对距离爆源处5、8、12 m位置设置质点速度监测仪,分别对得到的爆破振动信号进行频谱、能量谱分析,得到关于二氧化碳相变爆破振动信号在空间和时间上的衰减规律。随着距离的增加,低频部分逐渐衰减只剩下高频段部分。在能量的分布上,二氧化碳相变爆破的能量主要分布在中低频段(0 Hz相似文献   

低频爆破噪音的公害

现今，保护环境是人类面对的一项重要课题，一个地方的环境好坏会直接影响到人们的生活与工作学习然而，在某些爆破施工现场由于人们的疏忽，低频爆破噪音给人们带来许多难以承受的危害。本文作者由于深受其害迫使到某爆破现场进行实地考察，以目堵了解的种种事实采写的这篇报告足以给人们敲起了警钟。     

跨临界二氧化碳热泵热水系统气冷器的仿真分析

建立了跨临界二氧化碳热泵热水系统中的气体冷却器模型，对管内二氧化碳和水侧的流动和传热进行了数值仿真；并运用该模型分析了系统运行时各有关参数对换热器性能的影响，并结合最优排气压力，研究使系统高效运行的方法，为气冷器的优化设计提供了基础。     

Optimization of cryogenic carbon dioxide capture from natural gas

Cryogenic carbon dioxide removal from natural gas requires accurate thermodynamic phase study of the natural gas mixture and individual components. Thermodynamic data generation of carbon dioxide‐methane mixture having 90 % carbon dioxide for cryogenic carbon dioxide capture from natural gas using Peng Robinson equation of state is discussed in this research work. Golden section search technique along with Eureqa optimizing tool is then used to optimize the pressure‐temperature conditions for the cryogenic carbon dioxide capture in the solid‐vapour two‐phase region. Cost optimization is done for the carbon dioxide capture system at atmospheric pressure and 20 bar. Temperature ranges for optimization were obtained from the predicted thermodynamic data for the mixture. The optimum temperatures obtained in this research work for the cryogenic carbon dioxide capture at atmospheric pressure and the 20 bar are ?103.8 °C and ?60.90 °C respectively. For atmospheric pressure at ?103.8 °C the worth of methane, carbon dioxide, and energy is 114 $/h, 9 $/h, and 53 $/h respectively, while at 20 bar and ?60.9 °C the worth of carbon dioxide, methane, and the energy are found to be 129 $/h, 46 $/h, 52 $/h, respectively.     

爆破地震荷载作用下埋地燃气管道动力响应尺寸效应研究

基于量纲分析理论,分析既定爆破地震作用下影响埋地燃气管道振动速度的物理量,推导得出反映管道尺寸效应的爆破振动速度预测公式.结合全尺度埋地球墨铸铁燃气管道下穿爆破试验,建立简化模型计算分析并通过现场实测数据进行验证.采用已验证模型及参数,考虑武汉地区常见管道类型及埋设条件,分别建立不同管道尺寸(不同管道直径、不同径厚比)...     

膜接触器分离混合气中二氧化碳

以N-甲基二乙醇胺（MDEA）水溶液为吸收剂,采用疏水性聚丙烯中空纤维膜组件（HFPPM）作为膜接触器,研究了膜接触器分离CO2/N2混合气传质性能,主要考察了吸收剂浓度,液速,吸收温度,原料气浓度和气速等因素对CO2吸收性能的影响,比较了同一膜组件不同流程和不同膜组件及膜形态对分离效果的影响,并对膜组件运行的稳定性进行了初步考察,实验结果表明,采用MDEA溶液和HFPPM膜接触器分离CO2/N2混合气具有较快的传质速率和较高的分离效率．     

临近燃气管道的爆破质点峰值振速预测

为研究南宁市某水利枢纽疏浚爆破对临近燃气管道产生爆破振动的衰减规律及其影响,采用爆破振动测试仪对爆破荷载下燃气管道的振动峰值速度进行监测。根据实测数据,利用线性回归与非线性回归方法进行分析。结果表明:运用回归分析得到的预测模型拟合精度较高,且非线性回归分析的预测模型比线性回归分析的预测模型精度高。非线性回归分析模型的相对误差为5.44%,线性回归分析模型的相对误差为6.38%。     

临近燃气管道的爆破质点峰值振速预测

为研究南宁市某水利枢纽疏浚爆破对临近燃气管道产生爆破振动的衰减规律及其影响,采用爆破振动测试仪对爆破荷载下燃气管道的振动峰值速度进行监测。根据实测数据,利用线性回归与非线性回归方法进行分析。结果表明:运用回归分析得到的预测模型拟合精度较高,且非线性回归分析的预测模型比线性回归分析的预测模型精度高。非线性回归分析模型的相对误差为5.44%,线性回归分析模型的相对误差为6.38%。     

Hydrogen component fugacities in binary mixtures with carbon dioxide

The fugacity coefficients of hydrogen in binary mixtures with carbon dioxide were measured using a physical equilibrium technique. This technique involves the use of an experimental chamber which is divided into two regions by a semipermeable membrane. Hydrogen can penetrate and pass through the membrane, while the other component (in this case carbon dioxide) cannot. At equilibrium, pure hydrogen will permeate into one compartment of the chamber, while the binary mixture occupies the other compartment. Thus, the pressure of pure hydrogen on one side of the membrane approaches the partial pressure of hydrogen in the mixture on the other side of the membrane. This allows the direct measurement of the hydrogen component fugacity at a given mixture mole fraction. In this study, results are reported for measurements made on the hydrogen+carbon dioxide binary at 80°C (353 K), 130°C (403 K), 160°C (433 K), and 190°C (463 K), each at a total mixture pressure of 3.45 MPa. The experimental results are compared with predictions from the Redlich-Kwong, Peng-Robinson, and extended corresponding-states models.     

Solubilities of long-chain hydrocarbons in carbon dioxide

Heavy hydrocarbons are becoming an increasingly important problem for the natural gas industry as it develops more costly gas reserves, such as those in the deep Gulf of Mexico. The waxy substances precipiate during natural gas processing, causing blockage of transmission pipelines. Knowledge of the solubility behavior of these hydrocarbon solids is therefore necessary to develop solutions to the solid deposition problem. This work reports solid-supercritical fluid equilibrum data for long-chain n-alkanes in carbon dioxide, a component of natural gas, over a range of temperatures and pressures that are typical of natural gas processing. A flow apparatus was used to measure the solubility, and the data were correlated by the Patel-Teja equation of state. Satisfactory agreement was obtained between calculated and experimental values, so the equation of state may be used to estimate the conditions for solid deposition and the amounts of solids formed at typical processing conditions.Paper presented at the Twelfth Symposium on Thermophysical Properties, June 19–24, 1994, Boulder, Colorado, U.S.A.     

Application of carbon nanotube in wireless sensor network to monitor carbon dioxide

Carbon nanotubes (CNTs) are allotropes of carbon with a cylindrical nanostructure. Over the years, new discoveries have led to new applications, often taking advantage of their unique electrical properties, extraordinary strength and efficiency in heat conduction. Since industrialisation, human activities have resulted in steadily increasing concentrations of the greenhouse gases. Excess amount of carbon dioxide (CO₂) in living environment is toxic and unsuitable for human consumption. Thus, a need exists for accurate, inexpensive, long-term monitoring of environmental contaminants using sensors that can be operated on site. Over the past decade, many wireless sensor network (WSN)-based monitoring applications have been proposed. This article reviews the developments of sensing elements to monitor CO₂ in the environment. The cylindrical carbon molecules have novel properties that make them potentially useful in many applications in nanotechnology, electronics, optics and other fields of materials science, as well as potential sensing element in wireless sensor technology. They exhibit extraordinary strength and unique electrical properties, and are efficient thermal conductors. The unique properties of CNT makes it a potential sensing element in the WSN technology.     

The viscosity of liquid carbon dioxide

The paper reports new masurements of the viscosity of liquid carbon dioxide along three isotherms at 260, 280, and 300 K for pressures up to 100 MPa. The measurements have been carried out in a vibrating-wire viscometer and have an estimated accuracy of ±0.5%. The results are employed to distinguish between conflicting data sets that already exist in the literature and that have inhibited accurate representations of the viscosity of this important fluid. It is shown that the experimental results can be represented with a high precision by means of procedures founded on the hard-sphere theory of liquids, although the observed density dependence of the viscosity is different from that characteristic of hydrocarbons.