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利用CAESARII应力分析软件程序对汽轮机进口管道进行了应力分析,根据ASMEB31.3《工艺管道》标准要求进行应力校核,管口受力按照NEMA SM23进行核定,进而对汽轮机进口管道的布置提出一般性解决方案。 相似文献
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通过有效体积转化进行分离器尺寸设计,针对高气液比工况设计了一种二级旋流气液分离装置,基于液滴在旋流场中的破碎特性及Navier?Stocks方程的简化求解建立一种分离器直径的校核方法,通过实验验证了该校核方法有效. 通过CFD方法对简化的分离装置内部流场的非对称性进行分析. 结果表明,旋转流场的不稳定程度随入口面积和升气管直径减小而减小,入口速度不影响流场的不稳定程度,不同的长宽比在相同的入口面积下对内部流场的非轴对称性无显著影响,但单独增加入口的长、宽或二者同时增加使入口面积增大,将使分离器筒体横截面与入口截面的面积比KA减小,增加内部流场的非轴对称性. 相似文献
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为弄清汽轮机进汽缸内的流动细节,找到导致调节汽阀运行不稳定的原因,采用SIMPLEC算法对某型汽轮机进汽缸内调节汽阀在工作开度下的流场进行了三维可压缩黏性数值分析.研究结果表明,调节汽阀左右两侧开度的较大差异导致的流场不对称,主控通流能力、流动特性和稳定性的喉口部位流场的剧烈变化,阀碟底部产生的空穴区等是造成调节汽阀振动的主要原因. 相似文献
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阐述了某大化肥合成气压缩机汽轮机在试车时出现的振动异常,通过对汽轮机缸体膨胀指示器读数的监控,对汽轮机猫爪状况进行了检查,利用受力分析软件重新对实际布置管道进行力的计算,以及对汽轮机允许受力校核,发现汽轮机的蒸汽管道柔性设计不好,其进汽管道产生的力和力矩过大,不符合标准要求,由此确定汽轮机的异常振动是由入口蒸汽管道拉动缸体而引起的。采取对蒸汽管道进行分段考虑、分析,将活动管架改为固定死支架,选用弹簧力较小的恒力弹簧支吊架及可变弹簧支吊架,改变支架的位置,使用限位支架等措施降低了蒸汽管道热膨胀产生的力和力矩对汽轮机的影响,消除了汽轮机的异常振动。本次实践为类似振动问题的处理提供了参考,同时,在新建的项目中这一问题应该引起高度重视。 相似文献
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重点分析了氢化反应器耳式圈座的结构及组合截面的近似计算过程,提供了氢化反应器耳式圈座详细的设计和强度校核。 相似文献
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孙瑾 《化学工业与工程技术》2001,22(4):44-46
蒸汽纯度对透平机的运行有较大影响。蒸汽中的污染物来源于补充水及其中加入的化学品 ,以及工艺冷凝液夹带物等 ,污染物随蒸汽进入透平机后易造成流道结垢与腐蚀 ,导致透平机性能降低与损坏。加强蒸汽纯度的控制及停机后的保护是透平机长周期稳定运行的重要条件之一 相似文献
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Frank L. Del Nogal Jin‐Kuk Kim Simon Perry Robin Smith 《American Institute of Chemical Engineers》2010,56(9):2356-2376
This article presents a novel, systematic, and robust procedure for driver and power plant selection based on mathematical programming. The discrete nature of gas turbines is considered as gas turbine drivers and gas turbine‐based power plants are selected from a group of candidates. Plant availability with considering parallel compression has also been included, which allows a more comprehensive exploitation of the trade‐offs between capital costs, operating costs, and availability. When neglecting process heating and any steam equipment, the formulation can be applied to heavily power dominated processes, such as LNG. However, a more comprehensive formulation, allowing waste heat recovery and the integration with a multilevel steam system, is also proposed to produce more thermally efficient systems. This approach proved to be flexible and robust and is the first in producing solutions ranging from no‐steam to all‐steam systems, including all‐gas turbine, all‐motor and hybrid gas turbine/motor/steam systems. © 2010 American Institute of Chemical Engineers AIChE J, 2010 相似文献
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Gas‐turbine‐based cogeneration systems have been widely used in different applications in recent years. Although the most common method of using gas turbine exhaust energy is through the generation of steam in a heat recovery boiler, there are some applications where the exhaust energy has been directly used for drying or process fluid heating. In this work, direct integration of a gas turbine with a process was fully investigated in the context of pinch technology. This investigation includes simple gas turbine and gas turbines equipped with recuperator and afterburner. It was found that the best thermodynamic efficiency in a direct gas turbine system is achieved when two conditions are met: first, turbine inlet temperature is maximized, second, optimum pressure ratio is that which yields the maximum specific network. Two total cost optimization methods were also introduced. The first method is based on the assumption that power produced equates to power demand. In the second approach the power export opportunity was also considered. Finally, illustrative examples have been presented to show how approaches can be applied in practice. 相似文献
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介绍了云南云天化红磷化工有限公司硫酸装置B0.7-1.0/0.5型热工联产汽轮发电机组的汽轮机调节系统,分析了汽轮机主汽阀挂闸装置自动脱扣的故障原因,提出了在楔形键与套筒的键槽之间增加铜皮的处理方法。经过检修,解决了汽轮机主汽阀挂闸装置存在的问题,保证了热工联产汽轮发电机长周期稳定运行。 相似文献
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