液化石油气储罐泄漏的消防安全设计分析

液化石油气属于容易被点燃和被引爆的物体,在经过生产、运输、运用、存放过程里,当条件符合时,就特别容易被点燃甚至引爆,造成人身伤亡以及财产损失的情况发生。处置这样情况对于消防部门来讲是长发性事故,通过对液化石油气储罐泄漏的原因进行分析,分析液化石油气罐泄漏的危害性,并通过其质量上的设计、合理性的设计、隔热防火的设计、安全检查装置等方面的设计,以及如何控制液化石油气管下楼的消防安全设计来进行分析。、     

液化石油气储罐泄漏火灾爆炸事故后果模拟分析

液化石油气具有易燃、易爆、破坏力强的特点,在储存和使用过程中存在泄漏的危险。本文对液化石油气储罐泄漏后发生火灾爆炸模拟分析,并提出了一系列加强液化石油气储罐预防泄漏的对策措施,以确保液化石油气站的安全稳定运行。     

浅析液化石油气储罐泄漏事故后果类型

本文应用事件树评价方法分析了液化石油气储罐和相关附件泄漏事故的类型,寻找防止液化石油气泄漏的防治办法,为液化石油气安全生产事故的预防提供技术支持。     

液化石油气储罐泄漏爆炸原因及处置措施

介绍了液化石油气的理化性质,液化石油气泄漏的几种常见的事故原因及泄漏、爆炸形式,并提出预防的基本方法和处置此类泄漏、爆炸事故的基本程序及具体措施。     

液化石油气储罐的设计

根据笔者的设计体会和有关资料,对液化石油气储罐的结构、设计参数、安全阀、制造、使用等方面进行了论述。     

液化石油气储罐使用中应注意的几个问题

针对目前液化石油气储罐使用中存在的问题，介绍了正确选购和操作液化石油气储罐应注意的几个问题。     

液化石油气卧式储罐的规则设计

结合《固定式压力容器安全技术监察规程》和《压力容器》的实施,围绕20m3液化石油气卧式储罐的设计,来探讨在液化石油气卧式储罐的规则设计中参数的确定、材料的选择、结构的设计以及制造技术要求。     

浅谈液化石油气储罐的危险性与预防措施

本文以陕北永宁采油厂野山联合站液化石油气储罐为例,结合液化石油气的组成成分及理化特性,对液化石油气储罐的危险性进行分析,并提出了有针对性的防范措施,以期对同类液化石油气储罐的安全防范有指导意义。     

埋地式液化石油气储罐的设计

介绍了埋地式液化石油气储罐的特点和设计,并对设计中应注意的问题进行了论述。     

油气集输管道穿越处套管端封堵方案探讨

道路穿越中常通过钢制套管保证埋地管道安全。套管管端封堵为规范强制要求。高温、高压集输管道形变趋势大,可能影响套管端密封性,应对现有封堵方式进行深入探讨。根据相关规范要求,结合管道轴向应力理论,解释了埋地管道活动规律,推导并验证了套管封堵端的受力计算公式,分析了常用封堵方案(刚性封堵和柔性封堵)用于集输管道系统的可靠性,提出了套管端封堵的完善建议。结果表明,推导的封堵端受力计算方法与软件模拟结果接近;集输管道所需约束力通常较大,刚性封堵无法提供足够锚固力,主管道的应变将破坏其稳定性;柔性封堵能够提供满足管道活动的位移裕量,可作为集输管道穿越中首选套管端封堵方案。本文的研究成果为套管封堵的安全设计提供了参考与借鉴。     

浅述塔式容器的整体焊后热处理

简要阐述了焊接应力产生的机理及危害,较详细地探讨了整体消除塔式压力容器由于焊接而产生内应力的几种方法。消除焊接应力的热处理一定要根据热处理规范掌握好温度和时间两个要素,缺一不可,保温温度是取得焊后热处理效果的重要条件。     

MTP反应中LPG的杂质对H-ZSM-5催化剂的影响

作为循环烃替代原料,国内某批次的液化石油气(LPG)中含有微量的杂质,且杂质含量高于Lurgi公司的甲醇选择性制丙烯(MTP)技术要求。本工作研究了该LPG中杂质对MTP催化剂结构和性能的影响。结果表明,LPG与甲醇共进料时,催化剂表现出了良好的催化活性、抗结焦性和再生性能。ICP测试显示在气相反应条件下,LPG中微量杂质在催化剂上未有明显的沉积现象。XRD表征说明反应前后和再生催化剂的骨架结构保存完好。NH3-TPD表征显示反应前后和再生催化剂的弱酸位数量未发生明显变化。这表明可以利用工业LPG作为循环烃的替代原料。     

复极离子膜电解工艺中氯氢压差控制系统的探讨

介绍了复极离子膜电解工艺中氯氢压差控制系统的基本原理、技术细节,以及回路调试等方面的实际经验。     

Studies on the toughness and water resistance of zein-based polymers by modification

To develop novel biodegradable materials, zein was modified using polycaprolactone (PCL)/hexamethylene diisocyanate (HDI) prepolymer. The modified zein polymers, containing various PCL-HDI components (PCLH) content and plasticized by Dibutyl l-tartrate (DBT), were compression-molded. Mechanical properties, water resistance, thermal properties and morphology of the molded zein-based sheets were investigated. The toughness was improved significantly by a small amount of PCLH due to the existence of micro-phase separation structure in the sheets. In particular, zein exhibited better mechanical properties when modified by 20-50 wt% PCLH, and when the corresponding sheets were immersed in water for 24 h than when stored in 75% relative humidity. This implies an excellent water resistance. Thermal analysis indicated that the formation of physical cross-linking from PCLH segment extension, and the plasticization of water to the zein matrix, improved the water resistance of modified zein sheets. DBT had a stronger interaction with zein than with PCLH, and was considered as a compatibilizer for zein matrix and PCLH component in modified zein sheets.     

炭黑/橡胶力敏复合材料压阻特性的研究

采用机械共混法制备炭黑/BR、炭黑/BR/NR和炭黑/甲基乙烯基硅橡胶(MVQ)力敏复合材料,并对其压阻特性进行研究。结果表明,炭黑/MVQ复合材料导电炭黑的逾渗阈值最小,压力敏感特性最强;随着压应力的增大,炭黑/BR、炭黑/BR/NR和炭黑/MVQ复合材料的压阻重复性依次下降。采用多乙烯基硅油和全硫化粉末BR,可改善炭黑/MVQ复合材料的压阻重复性。     

Influence of injection temperature and pressure on the properties of alumina parts fabricated by low pressure injection molding (LPIM)

The quality of ceramics parts made by powder injection molding (PIM) method is influenced by a range of factors such as powder and binder characteristics, rheological behavior of feedstock, molding parameters and debinding and sintering conditions. In this study, to optimize the molding parameters, the effect of injection temperature and pressure on the properties of alumina ceramics in the LPIM process were thoroughly studied. Experimental tests were conducted on alumina feedstock with 60 vol% powder. Injection molding was carried out at temperatures and pressures of 70–100 °C and 0.1–0.6 MPa respectively. Results showed that increase in injection temperature and pressure and the resulting increase in flow rate leads to the formation of void which impairs the properties of molded parts. The SEM studies showed that injection at temperature of 100 °C results in evaporation of binder components. From the processing point of view, the temperature of 80 °C and pressure of 0.6 MPa seems to be the most suitable condition for injection molding. In addition, the effects of sintering conditions (temperature and time) on the microstructure and mechanical properties are discussed. The best final properties were found using injection molding under the above stated conditions, thermal debinding and sintering at 1700 °C during 3 h.     

浅谈耐水金属箔标签胶的耐水机理

从化合物的分子结构方面讨论了金属箔标签胶的耐水机理。并用实验验证了以上机理     

上顶栓压力对混炼过程的影响

通过在Ｘ（Ｓ）Ｍ－１．７型密炼机上进行５种配方和４种压力的试验,研究了上顶栓压力的变化对混炼过程的影响。当转子转速为１６０ｒ／ｍｉｎ,冷却水温度为４０℃,填充系数为０．６５时,最佳的上顶栓压力为０．５～０．６ＭＰａ。     

南堡35-2CEP平台净化水缓冲罐存在问题及改造措施

南堡35-2油田属于高粘重质油油田,油田CEP平台处理B平台热采井采出液的难度大。含油污水进入净化水缓冲罐后,造成顶部浮油聚集、底部沉积污泥。目前净化水缓冲罐内没有底部排污管线,只有固定式单管收油装置,且操作复杂,排油效率低。由于收油及排污不彻底,净化水缓冲罐净化水含油基本上比核桃壳滤器出口含油高4~7ppm。因此,需要对净化水缓冲罐内增加浮动式收油装置和底部排污管线,来达到提高注水水质的目的。