共查询到19条相似文献,搜索用时 218 毫秒
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《中国石油和化工标准与质量》2017,(16)
本文对常、低压储罐,大型低温储罐,压力储罐和其他各种压力容器、压力管道等设备设施进行了简单的介绍,并对在化工设计过程中,呼吸阀、气封系统、紧急泄放阀等安全泄放装置的原理、分类及特点进行了简单的概述。根据各类设备、管道及操作介质的特性,正确选用安全泄放装置在化工设计工作中具有重要意义。 相似文献
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简述了防止储罐内部发生超压事故的技术措施;介绍了美国石油化工协会标准——API中关于储罐遭遇火焰时必须紧急泄放相应气量的计算方法;阐述了目前国内外普遍采用的紧急泄放装置的结构形式和选用方法;以实例计算了储罐顶部紧急泄放人孔的规格尺寸和数量。 相似文献
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简述了安全泄放装置的种类,介绍了安全泄放装置选用的适用工况、步骤及一般规则,并通过计算泄放面积或口径来确定选型。同时也介绍了安全泄放装置的设置方式及设置方式选用的一般原则。 相似文献
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由于环氧乙烷的特殊物性和环保安全要求,工程设计上做到环氧乙烷储罐安全泄放尤为重要。本文从环氧乙烷储罐安全泄放的工艺系统角度,详细研究和论证了目前环氧乙烷储罐安全泄放的工艺系统,提出一种切实可行、安全有效的环氧乙烷储罐安全泄放工艺系统 相似文献
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LNG低温储罐压力安全系统设计 总被引:2,自引:1,他引:1
介绍LNG低温储罐压力安全系统设计的基本思路,并针对不同情况讨论LNG低温储罐超压时BOG气体泄放量和产生负压时空气补充量的计算,为LNG低温储罐的安全阀、真空阀及紧急泄放系统提供设计基础。 相似文献
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介绍石油化工常压及低压储罐安全泄放设施设计选用的主要原则和计算方法,分析和讨论设计中应注意的问题。 相似文献
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刘晓 《中国石油和化工标准与质量》2014,(7):242
本文结合实际工作中的经验,综合阐述了常压及低压储罐附属安全泄放设施的设计选用要点与计算方法等,以期能够对从事储罐统设计人员提供有价值的理论参考。摘要 相似文献
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以某原油输送中泄压罐泄压设施为例,采用API国际标准,简述原油紧急泄放装置瞬间泄放的计算方法以及设计中原油泄压罐的泄压流量最大面积与储罐顶面积的比值选定。 相似文献
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液化石油气作为易挥发介质,在常温下的饱和蒸汽压可以达到1.36 MPa,因此液化石油气在常温下需要储存在压力容器中。为了保证其储存的安全性和流程设计的合理性,结合克石化球罐区设计的具体项目,对液化气球罐在工艺设计中涉及到的重点内容作以详细归纳,例如球罐二次脱水工艺的设计、事故状态下的水顶烃工艺和罐区布置。此外,为保证球罐在事故状态下能够安全泄放,罐顶安全阀的设置尤为重要,将理论计算与实际设计参数相结合,对1 000 m3和2 000 m3球罐安全阀的的选取进行了详细计算说明,将对液化气球罐的设计具有指导作用。 相似文献
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采用危险化学品重大危险源安全评价方法,通过定量计算判断并确定液氨罐区属于三级重大危险源. 根据液氨储罐泄漏可能造成的典型事故后果,建立蒸气云爆炸模型,计算的蒸气云爆炸可能造成的死亡半径为4.18 m、重伤半径为16.04 m、轻伤半径为31.19 m及安全防护距离为100.4 m. 通过建立有毒有害物质泄漏扩散模型,结合气象条件模拟泄漏扩散场景,进行定量分析计算,得出下风向中毒距离为312.01 m、横风向中毒距离为72.01 m及中毒区域面积为16291.70 m2. 出于提升液氨储罐本质安全水平的考虑,结合最新的危险化学品重大危险源储罐安全标准和规范的要求,对液氨储罐提出技术改造思路,具体措施包括加装外贴式液位计、温度计和压力变送器;气、液两相管道增加自控阀,设置高低位液位报警连锁装置及有毒气体报警仪;增设自控启动应急喷雾吸收系统;储罐区增加视频监控;完善风向标、洗眼器及静电释放器等,并完成了技术改造工作. 相似文献
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对管网叠压供水设备准入条件及其组件气压罐、稳流罐、倒流防止器进行探讨,认为系统中是否要设置气压罐应根据计算分析而定。当供水管网正常运行,设备进水管的补水能力大于系统的设计流量时,可不设置稳流罐;叠压供水设备直接由市政管网吸水为住宅小区、公共建筑增压时,水泵前应安装低阻力倒流防止器。 相似文献
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A.M. Birk 《Chemical Engineering Communications》1989,80(1):153-171
In many applications there is a requirement to retard accidental heating of pressure vessel shells so that loss of pressure carrying capacity due to increasing shell temperature does not occur. For example, hazardous commodity transport and storage vessels are usually thermally insulated so that in the event of accidental fire the shell is not exposed to the full heating effects of the fire. The present paper deals with a concept device that cools the walls of tanks carrying pressurized liquids by directing 2-phase fluid along the inner surface of the tank when the tank pressure relief valve is in action.
Preliminary experimental results are presented for the case of a short cylindrical tank with the cooling device installed. From the limited tests conducted it was shown that the device cools areas of the tank wall that would normally have been exposed to the full heating effects of the fire.
Based on observations from the tests a simple model was formulated and integrated with an existing tank-in-fire computer model. Simulation results indicate that internal wall cooling could be effective at reducing the risk of thermal ruptures of tanks. The simulation results for internally cooled tanks are compared with simulations and experimental data for an uninsulated tank filled with propane exposed to engulfing fires 相似文献
Preliminary experimental results are presented for the case of a short cylindrical tank with the cooling device installed. From the limited tests conducted it was shown that the device cools areas of the tank wall that would normally have been exposed to the full heating effects of the fire.
Based on observations from the tests a simple model was formulated and integrated with an existing tank-in-fire computer model. Simulation results indicate that internal wall cooling could be effective at reducing the risk of thermal ruptures of tanks. The simulation results for internally cooled tanks are compared with simulations and experimental data for an uninsulated tank filled with propane exposed to engulfing fires 相似文献
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叶琳 《化学工业与工程技术》2013,34(2):48-52
分析了常压储罐内压的影响因素,介绍了维持储罐内压稳定的常用保护装置——呼吸阀、氮气调节阀及紧急泄压阀的用途和控制范围,确定了完整的甲醇储罐压力保护体系。进行了呼吸阀、氮气调节阀及紧急泄压阀的气通量计算、选型以及压力值的设定。 相似文献
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《Computers & Chemical Engineering》2001,25(4-6):793-798
Pressure relief of near critical processes working at two phase region is simulated dynamically. The design procedure for pressure relief devices is demonstrated by an example. The example shows that the required relieving area of the safety valve depends on time and scenario. This is the basis for the selection of the type and the size of safety valve. When the process relieves through the selected valve the outflow and the pressure of the protected vessel varies dynamically. This phenomenon cannot be discovered by the static approach that is normally used in the design of pressure relieving devices. The traditional sizing equations, API 520 and DIERS, are also difficult to apply in near critical region and they include coefficients that are sometimes difficult to obtain. The sensitivity may be so large that a different size of the relieving device is selected depending on the model. Usage of two common models, API 520 and DIERS, in the region of two phases is discussed. 相似文献