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对聚丙烯装置丙烯循环气压缩机润滑油闪点,粘度降低影响设备运行的原因进行了分析,并采取了改进措施,改进后实践证明效果良好。 相似文献
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活塞式压缩机运行过程中极易出现气阀故障,从而影响到活塞式压缩机设备的稳定运行效果。本文通过对压缩机气阀机构进行优化改造设计,并通过试验进行效果测试。增强了压缩机设备运行的稳定性,节省了设备检修费用。 相似文献
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压缩机是一种提高气体压力和输送气体的设备,可用于脱硫、变换、脱碳、甲醇、铜洗、合成等工艺.针对压缩机运行中出现的气阀损坏、填料泄漏等问题,提出改进措施,保证6M50压缩机延长运行周期,并提高检修效率. 相似文献
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分析4M20甲醇气压缩机填料密封系统泄漏原因,对填料密封环的材质和结构进行改进,细化装配工艺。经设备运行试验,填料密封系统改进后使用密封效果显著提高,延长了检修周期,降低了运行检修成本。 相似文献
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富甲烷气压缩机运行2年来在运行过程中遇到的主要问题:压缩机二级压缩排气及三级压缩排期温度超设计值,导致二级排期阀和活塞环、三级排气阀和活塞环使用寿命严重少于备件使用要求,设备检修频次高,对甲烷转化系统运行稳定及运行单耗带来较大的风险,通过有效的分析和采取正确的改进措施,使这些问题得到有效的解决,降低设备维护成本,为甲烷转化装置平稳运行打下良好基础。 相似文献
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Low-temperature energy systems are processes that require cooling at temperatures below ambient, which are accomplished using refrigeration cycles. Little research has addressed the operational optimisation of refrigeration cycles considering the performance of existing equipment. This work develops a methodology for operational optimisation of refrigerated processes, taking into account existing centrifugal compressors. For the optimisation of multilevel cycles, the evaporation temperatures of each level are varied to find a set of operating conditions that minimise shaft work demand. The optimisation takes into account equipment constraints, including compressors on a common shaft, minimum and maximum allowable inlet flow rates, etc. Two examples are presented; the first represents a three-level refrigeration cycle and the second a cascade cycle. For the two examples, the conditions of the base case are optimised, identifying improvements of around 3% in shaft work demand. In addition, both cycles were also optimised for a range of process cooling demands. 相似文献
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蒋广生 《硫磷设计与粉体工程》2005,(1):38-40
生产高纯液态CO2是近几年开发的新技术。针对当前许多化工厂蒸馏塔产生的大量高浓度CO2气体的合理利用,介绍了高纯液态CO2的生产技术及主要设备特点,供该项技术的推广运用、渐臻完善参考。 相似文献
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Pressure drop is an important issue in design of a heat exchanger network (HEN), which has yet to be addressed properly. To overcome pressure losses incurred when streams flow through heat exchangers, pumps/compressors must be installed. The total cost for a system of pumps and compressors consists of the purchase cost of equipment and the electricity cost to run these equipment. This cost could occupy a significant part of the overall cost for a HEN design. Therefore, the pressure drop aspect should be considered together with the costs for heat exchanger area and utility consumption. A new approach is proposed to consider the pressure drop aspect in the overall context of a HEN design. Firstly, the optimal ΔTmin is determined through three-way trade-offs between area, utility and pressure drop at the targeting stage. As a result of targeting, targets for area, utility and pressure drops can be established ahead of the network design. Then a network structure is initialised at the determined ΔTmin and optimised to achieve a final design. In this procedure, the pressure drop is considered at both the targeting stage and the design stage in a systematic manner. 相似文献
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分析了现有煤制合成天然气技术主要存在的问题,介绍了新型无循环、适应宽氢碳比的VESTA甲烷化技术。VESTA甲烷化技术的显著特征是利用合成气中的CO2和外加水蒸汽来控制甲烷化反应温升,不需要操作条件苛刻的循环气压缩机;在甲烷化反应之前对原料气只脱硫、不脱碳,甲烷化反应之后再集中脱碳;经中试试验得出原料气中的H2/CO比不影响最终的SNG产品指标;甲烷化后的粗SNG产品气中的CO2体积分数高达71%,因而可在脱碳前低成本联产中压液体CO2产品。这部分液体CO2产品除了可用泵增压输送到粉煤气化单元用作输送气体外,还可以直接作为副产品为企业增加收益,并间接降低了碳排放。新型VESTA甲烷化技术与现有带循环压缩机的甲烷化技术相比,不但更容易操控,而且还提高了操作的稳定性和安全性,同时又能极大地降低净化装置、甲烷化装置及SNG干燥装置的投资和能耗。因此,采用VESTA甲烷化技术,能有效地提高煤制合成天然气的市场竞争力。 相似文献
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超临界CO2萃取红花药渣中挥发油和红色素 总被引:1,自引:0,他引:1
在0.5 L半连续装置上,考察了温度、压力、CO2流量及物料粒径等工艺条件对超临界CO2分级萃取红花水煮醇提药渣的影响,得到了红花挥发油和红花红色素,对红色素含量进行了测定,并同红花分级萃取进行了对比. 结果表明,温度、压力及CO2流量对分级萃取影响明显. 在考察范围内最佳工艺条件为:一级萃取温度35℃、压力9 MPa、CO2流量3.74 kg/h;二级萃取温度35℃、压力30 MPa、CO2流量3.74 kg/h. 在此条件下红花挥发油萃取率达2.74%,红色素相对收率达69.88%. 相似文献
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以天津1000 kt/a乙烯装置为例,从工艺设备布置,压缩机厂房布置及从多因素决定压缩机安装高度、压缩机和汽轮机蒸汽管线布置、管道冲击力等方面介绍大型裂解气压缩机设备布置和配管的设计特点和经验。 相似文献