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甲醇新鲜气主要含有H_2、CO、N_2、CO_2、O_2和CH_4等六种主要组份。经典的分析方法是用奥氏仪对各组份进行定量。这种方法分析速度比较慢,精度差,工人的劳动强度大。近年来有人用5A分子筛和GDX为固定相,用气相色谱法分析甲醇新鲜气中 相似文献
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低温甲醇洗系统主要脱除原料气中的二氧化碳及硫化物,吸收了二氧化碳及硫化物的富碳和富硫甲醇分别通过减压解吸、氮气气提及加热再生的方式实现再生,再生甲醇通过贫甲醇泵提压后循环利用。因贫甲醇泵跳车,甲醇洗涤塔贫甲醇中断,导致了液氮洗分子筛吸附器穿透,造成低温液氮洗系统精制气通道堵塞,通过在线疏通,并对堵塞原因进行分析,提出了优化防范措施。 相似文献
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对德士古水煤气制甲醇和焦炉气制甲醇的两套生产能力相同的合成装置进行了比较.相同点为:采用的甲醇合成塔器相同,催化剂相同,生产甲醇的工艺条件相同,催化剂升温还原处理方法相同;不同点为:技术路线不同,气体成分不同,精甲醇产品质量不同.认为合成甲醇在相同的工艺操作条件下,由于反应气体成分的不同,造成了反应途径的区别,即焦炉气制甲醇在高CO2的条件下(体积分数6%~9%),甲醇合成反应主要是以甲酰基途径合成;德士古水煤气制甲醇在高CO条件下(体积分数15%-16%),甲醇合成反应主要是以甲酸基途径合成. 相似文献
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陕西延长中煤榆林能源化工有限公司一期1 800 kt/a甲醇装置、二期1 920 kt/a甲醇装置煤制气部分主要生产工艺均为多元料浆加压气化、绝热耐硫变换、林德低温甲醇洗(一期、二期系统分别采用全贫液、半贫液低温甲醇洗流程)及戴维甲醇合成工艺等。二期低温甲醇洗系统2021年6月满负荷运行后,出现净化气/贫甲醇换热器(02721E02)压差上涨问题,甚至引起了上游气化系统憋压而致变换气放空。分析与探讨工艺气中氨的形成机理及影响因素、二期甲醇装置工艺气中氨含量高的原因及低温甲醇洗系统内铵盐结晶原理,并与一期甲醇装置进行对比分析,确认02721E02压差上涨的原因为系统内氨含量偏高所致。为此,制定气化系统工艺气中氨含量的控制措施、低温甲醇洗系统排氨及调控措施,通过近2个月的工艺调整,二期低温甲醇洗系统内氨含量明显下降,02721E02压差下降且基本趋于稳定。 相似文献
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山东充矿集团煤化分公司下属兖矿国泰化工有限公司和山东兖矿国际焦化公司现有建成投产的2套年产236.5kt的甲醇装置,两套装置均为天辰设计院成套设计,采用国内比较成熟的低压甲醇合成技术,甲醇合成塔采用华东理工大学专利技术——绝热等温甲醇合成反应器,甲醇精馏采用三塔节能技术。由于2套装置采用原料气不同,造成工艺设计和产品质量有些不同,兖矿国泰化工有限公司采用德士古水煤浆气化制气,以水煤气为原料制的甲醇(简称水煤气甲醇,下同);山东充矿国际焦化有限公司采用年产2000kt炼焦装置剩余焦炉气为原料,以焦炉气制甲醇(简称焦炉气甲醇,下同)。 相似文献
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焦炉煤气生产甲醇技术进展及产业化现状 总被引:8,自引:0,他引:8
焦炉煤气制甲醇工艺的研发成功,不仅可以有效利用焦炉气资源,同时生产甲醇原料气。介绍了焦炉气制甲醇工艺中的净化工艺和转化工艺,以及该技术在我国目前的应用状况,并分析了其经济性指标。国内8万t/a及12万t/a两套装置顺利开车及稳定运行证明该工艺成熟、可靠。 相似文献
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针对低温甲醇洗装置克劳斯气夹带甲醇及系统甲醇中油含量高的问题,分析其原因并提出改进措施.对克劳斯气分离器降液管改造后,消除了克劳斯气夹带甲醇的现象,降低了系统甲醇中的油含量,取得了较好的经济效益. 相似文献
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Sodium sulphate is produced mainly from land ores by conventional crystallization methods of evaporation and dehydration; these sources are fast being exhausted and new processes should be found which do not use the conventional sources. Seawater bittern produced as by-product from solar halite plants contains about 6% by weight of sodium sulphate, the recovery of which by conventional methods, is made difficult by the presence of other salts.
Methanol has the property of markedly depressing the solubility of certain inorganic salts while hardly affecting the solubilities of others, because of this property, it can be used to promote various crystallization processes and some double decomposition reactions between inorganic salts. This paper examines one example of the second type of application in which magnesium sulphate and sodium chloride present in the bittern interact in the presence of methanol resulting in the formation and selective crystallization of anhydrous sodium sulphate.
Experimental work is described which follows the progress of the reaction under wide range of conditions some given above 94% recovery of high purity sodium sulphate with a crystallizer reactor residence time of 20 minutes. SEM photographs reveal rhombic shapes crystals of size varying between about 1 to 5 μrn. The results presented give promise of forming the basis of a commercially viable process for the fabrication of sodium sulphate. 相似文献
Methanol has the property of markedly depressing the solubility of certain inorganic salts while hardly affecting the solubilities of others, because of this property, it can be used to promote various crystallization processes and some double decomposition reactions between inorganic salts. This paper examines one example of the second type of application in which magnesium sulphate and sodium chloride present in the bittern interact in the presence of methanol resulting in the formation and selective crystallization of anhydrous sodium sulphate.
Experimental work is described which follows the progress of the reaction under wide range of conditions some given above 94% recovery of high purity sodium sulphate with a crystallizer reactor residence time of 20 minutes. SEM photographs reveal rhombic shapes crystals of size varying between about 1 to 5 μrn. The results presented give promise of forming the basis of a commercially viable process for the fabrication of sodium sulphate. 相似文献
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分析合成氨装置再吸收塔甲醇/贫甲醇换热器出口管系剧烈振动原因,提出相应解决措施,通过实施取得良好效果。 相似文献
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OPTIMAL TEMPERATURE PROFILE IN METHANOL SYNTHESIS REACTOR 总被引:1,自引:0,他引:1
An optimal temperature profile is determined for a methanol synthesis reactor of LURGI type. The temperature profile is estimated so that methanol production rate in the reactor outlet will be maximized. First, the reactor is simulated based on heterogeneous one- and two-dimensional models. The comparison of the simulation results and plant data shows that the heterogeneous one-dimensional model can reliably be used for determining optimal temperature profile. Since optimal temperature profile for reversible exothermic reaction in tubular reactors is a decreasing function of reactor length, the technique of control variable parameterization is used for determining optimal temperature profile in a methanol reactor. In this way, a third order polynomial is considered for the temperature profile and the polynomial coefficients are as decision variables. The optimization is based on a Quasi-Newton's method (BFS technique), and the objective function is methanol flow rate at the reactor outlet. The results of optimization indicate that if optimal temperature profile is implemented in the reactor, methanol production will significantly be increased. 相似文献