优化系统操作提高液化气收率

在催化裂化装置上进行了提高液化气收率的试验,通过调高反应温度,调整解吸塔底温度,提高稳定塔顶、底温度等操作参数,提高了液化气的收率,优化了产品结构,并且保证了产品质量.取得了一定的经济效益.     

优化系统操作提高液化气收率

在催化裂化装置上进行了提高液化气收率的试验,通过调高反应温度,调整解吸塔底温度,提高稳定塔顶、底温度等操作参数,提高了液化气的收率,优化了产品结构,并且保证了产品质量。取得了一定的经济效益。     

浅谈联合站气处理区浅冷系统

联合站气处理区主要通过透平膨胀机将干燥、除尘、预冷后的油田伴生气温度降到-75℃左右,再通过脱乙烷塔、液化气塔进行轻重组分分离,从而生产出C1、C2组分的天然气、C3、C4组分的液化气和C5以上组分的稳定轻烃。影响液化气和稳定轻烃收率的主要原因是深冷系统温度,而浅冷系统温度的高低直接影响着深冷系统和整个精馏系统效率的高低,所以有效的降低浅冷温度是目前提高液化气和稳定轻烃收率的重要方法之一。     

关于提高干气质量的问题分析及对策研究

为研究神华煤直接液化工艺生产流程中轻烃回收装置干气中C3以上组分含量高,液化气产量低的问题,实际对装置的吸收塔、解吸塔、稳定塔的实际运行指标进行了原因分析,总结了干气质量低,液化气产量低的原因,提出了改进措施。结果表明:提高设备换热效率、控制吸收塔参数操作合理、优化注水流程可有效提高干气质量及液化气产量。     

炼厂吸收稳定新工艺探讨

针对吸收稳定系统"干气不干"、液化气收率低的问题,通过分析现有工艺存在的问题,提出了解吸塔再平衡工艺技术,并进行了模拟计算和水力学分析,验证了工艺技术的可行性。研究表明,新工艺技术可降低干气中C+3组分体积分数,提高液化气收率,经济效益显著。     

提高天然气处理装置液化气收率的研究与改造

塔里木油田分公司轮南作业区近几年来液化天然气的实际产率较低 ,增加液化气产量是提高装置经济效益的重要途径。对天然气处理装置及原油稳定装置在生产运行过程中出现的问题进行分析研究 ,提出了增加液化气收率的改进措施     

吸收稳定系统与气分装置联合优化

碳四裂解装置的吸收稳定系统生产的液化气物料作为气分装置的进料,吸收稳定的操作影响着气体分馏(以下简称气分)装置的运行情况。使用Aspen Plus软件对吸收稳定系统和气分的脱乙烷塔进行了模拟,探究了吸收稳定的操作与液化气质量、脱乙烷塔丙烯损失之间的关系,提出了解吸塔合适的操作条件。通过将脱乙烷塔顶采出物料改为进吸收塔,达到了回收丙烯的目的,并且通过适当调整吸收稳定操作,可保证液化气和丙烯塔进料的质量。通过优化,一年可增加丙烯产品264 t。     

催化裂化装置提高液化气收率的工业试验

在催化裂化装置上进行了工业试验 ,考察了反应温度对液化气收率、汽油收率、柴油收率及汽油组成的影响。通过适当提高反应温度 ,提高了液化气的收率 ,优化了产品结构 ,保证了产品质量     

乙二醇脱水工艺在大型高压天然气处理装置中的优化运行

大型高压天然气处理装置加纳天然气处理厂应用乙二醇脱水工艺,容易产生乙二醇再生系统设备腐蚀、乙二醇大量损耗、换热器冻堵等问题,从而导致管输商品气产品不合格和液化气LPG产品收率降低。分析原因后,采用更换乙二醇再生塔填料,增加乙二醇过滤器滤芯更换频率,提高乙二醇再生温度,控制乙二醇p H值和调整乙二醇加注喷嘴角度的方法逐步解决了问题,使得商品气符合产品要求和液化气收率明显提高。     

催化裂化装置吸收稳定系统的技术改造与操作优化

对中原油田分公司石油化工总厂Ⅱ套同轴式催化裂化装置进行了多次技术改造,通过改造吸收-稳定系统四塔内部构件,采取提高吸收塔压力、提高解吸塔热进料温度、控制稳定塔合适的回流比等措施,使干气中C_3~ 含量降到3％(体积)以下,液化气、稳定汽油产品合格率达100％。     

浅谈液化石油气罐区火灾爆炸危险性控制

液化石油气罐区作为易燃易爆危险区域,存在发生火灾爆炸事故的潜在危险。通过对其发生原因的分析,介绍了一些关于液化石油气罐区火灾爆炸危险性控制的方法。     

液化石油气制芳烃技术开发及工业应用

采用组合固定床反应-再生系统和改性HZSM-5分子筛催化剂,开发出利用液化石油气制芳烃工艺(GTA)。该工艺可将液化石油气转化为苯、甲苯和二甲苯等轻质芳烃,而且流程简单,操作稳定,所产混合芳烃不含非芳烃组分,简化了抽提流程,节省了投资,并降低了能耗。4.0万t/a的工业化装置运行结果表明:利用GTA技术能将醚化后的C4组分转化为质量分数56.76%的芳烃,同时还能得到质量分数为23.74%的民用液化气。     

液化石油气脱硫剂室内研究及应用

文昌油田液化石油气(LPG)回收项目是中海油湛江分公司到目前为止唯一一个海上LPG回收项目,项目投产至今,创造了良好的经济效益和社会效益。近年来检测文昌油田LPG产品时而会发生铜腐测试不合格情况。经过现场调研论证发现该铜腐超标和LPG中夹带硫化氢相关。利用液化石油气脱硫剂能够很好地解决该问题。本文讨论了合成液化气脱硫剂的最佳反应条件:合成反应时间8h、PMA质量分数50%、反应温度70℃,DEA/MEA混合液质量分数40%,液化气脱硫剂的脱硫率最高可以达到99.13%。通过以上合成条件,合成了脱硫剂ETTS-1D2。ETTS-1D2在pH低于5,反应温度高于100℃时脱硫效率会受到一定影响。液化气脱硫剂以加注量50mL/min,在现场应用的6个月的时间里,可以有效地将铜腐指标从2a降低到1a。确保LPG产品符合国标标准要求。     

关于液化石油气储罐设计参数的技术分析

液化石油气储罐为典型的压力容器,对比不同时期出版的标准或法规,设计压力的取值一直在不断地被优化调整。这一变化表明:正确理解标准和选择设计参数是至关重要的,同时更加关注设计压力、混合液化石油气组分、饱和蒸气压以及装量系数是正确的设计选择。     

液化石油气、二甲醚检测方法述评

现行有效测定液化石油气、二甲醚组分的标准方法有GB/T 10410-2008《人工煤气和液化石油气常量组分气相色谱分析方法》、SH/T 0230-1992液化石油气组成测定法（色谱法）、SH/T 1483-2004《工业异丁烯中含氧化合物的测定气相色谱法》,液化石油气、二甲醚产品标准（国家标准或企业标准）中也规定了所采用的液化石油气、二甲醚检测方法。这些检测方法都是推荐性的,均为色谱法,文献也报道了许多改进方法。根据社会经济发展需要和二甲醚产业发展情况,有必要研究出台可用于仲裁的液化石油气、二甲醚检测标准。     

空速对焦化汽油产物分布的影响

以抚顺焦化汽油为原料,采用小型固定流化床为反应装置,考察了空速对产物分布、轻油产品族组成、干气组成和液化气组成影响规律,同时通过实验数据建立了空速与干气收率、液化气收率、焦炭收率、轻油收率和总收率的关系式。实验结果表明,随着空速的增加,焦炭、干气和液化气收率逐渐下降,轻油收率逐渐增加,芳烃含量缓慢下降,而饱和烃含量基本没有变化。     

Simulation analysis of gas–solid flow characteristics and water evaporation in flue gas semi-dry desulphurization process based on CPFD method

The gas–solids flow in an industrial-scale semi-dry method desulphurization tower is simulated by the computational particle fluid dynamics (CPFD) approach. Compared with previous studies on desulphurization towers, this study focuses on analyzing particle distribution characteristics such as particle volume fraction, temperature distribution, and residence time. The simulation fully considered the particle–fluid, particle–particle, and particle–wall interactions in the desulphurization tower. Based on these considerations, the effects of flue gas inlet velocity and temperature on the gas–solid distribution characteristics of the desulphurization tower are simulated. An optimization scheme for adjusting the gas–solid flow in the desulphurization tower is proposed. The research results show that the error between the CPFD simulation data and experimental data is small and the changing trend is consistent. The particles in the bed of the desulphurization tower show a typical core–annulus flow. The distribution of gas and particles in the bed has a serious deviation with the increase of the flue gas inlet velocity and temperature. As the axial height of the desulphurization tower increases, the flue gas velocity, temperature, particle concentration, and water vapour distribution in the bed become more uniform. The relatively stable operating conditions for the gas–solid flow in the desulphurization tower is that the flue gas inlet velocity and temperature are 15 m/s and 393 K, respectively. Under these operating conditions, the pressure loss caused by the venturi accounted for 73.6% of the total pressure loss of the desulphurization tower. When the particle radius is between 0–150 μm, the particle size and the flue gas inlet velocity have the greatest influence on the particle residence time. Finally, the distribution of gas and particles before and after the adjustment of the desulphurization tower is compared, which showed that adjusting the bottom structure of the desulphurization tower could optimize the gas–solid flow.     

液化石油气芳构化技术综述

综述了国内外液化石油气芳构化技术,分析了各种液化石油气芳构化技术的特点,并指出,液化石油气芳构化技术在关注催化剂活性和稳定性的同时,还应关注催化剂选择性和副产物综合利用。     

Simulation and optimization of an industrial gas condensate stabilization unit to modify LPG and NGL production with minimizing CO2 emission to the environment

In the present study, a great effort was made to improve the performance of an industrial liquefied petroleum gas(LPG) and natural gas liquid(NGL) production unit in one of the major gas refinery located at Pars special economic zone in Iran. To demonstrate and obtain the optimal condition, the unit was simulated by using a steady-state flowsheet simulator, i.e. Aspen Plus, under different operational conditions. According to the simulation results,the unit was not operational under its optimal conditions due to some defects in the cooling system at top stage of the debutanizer tower(DBT) during hot and humid seasons. Additionally, the vapor pressure of produced LPG and accordingly the amount of its flaring were decreased by reducing the temperature of debutanizer tower at top stages. In the optimization section, the DBT condenser and reboiler heat duty, temperature, and pressure were regulated as adjustable parameters. The simulation results demonstrated that by applying the optimum suggestion in the hot months, the reflux stream temperature was reached about 55 ℃ which caused an efficient increment in LPG production(about 4%) with adjusting the propane component in LPG, based on the standard range as the plant criteria. Moreover, after applying modifications, about 750 t of LPG product was saved from flaring during five hot months of the year, which resulted in 360000 USD extra annual income for the company.Finally, from environmental point of view, this optimization caused to reduce 81 t of CO_2 emission to the environment. Therefore, the current investigation must be introduced as a friendly environmentally process.     

无干燥塔的硫磺制酸装置

无干燥塔就无串酸,只产w(H2SO4)98%产品酸,开停车时干气来自吸收塔。比较了无干燥塔的带酸热回收硫磺制酸装置在亚热带湿润气候下的4种工况,副产蒸汽量与空气中水分相关,气温越高、湿度越大,蒸汽产量越多,且中压蒸汽产率更高。采用空冷增湿酸冷却器,可实现无循环水,将干吸余热全部回收,蒸汽产率可达2 t/t。若用部分冷凝省煤器,还可再提高蒸汽有效能,使部分低压蒸汽转变成中压蒸汽。该装置可直接掺烧废酸、酸性废水及含硫废气,成为含硫废弃物协同处理装置,不仅增加能量回收率,且低成本地处置含硫废物。