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小合成氨厂碳丙脱碳综述 总被引:1,自引:0,他引:1
针对目前小合成氨厂碳丙脱碳存在的问题,详细分析了影响碳丙脱碳装置正常生产的因素,总结了90年代以来人们在解决生产实践中诸多问题的经验和方法,并碳丙脱碳工艺作了总结与评述。 相似文献
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介绍了4种脱碳方法的发展现状,并对其性能优劣进行评述:碳酸丙烯酯(PC)法不仅溶剂损失大,净化气中CO2含量高,而且碳丙溶液对碳钢有腐蚀,生产效率低,能耗高;N-甲基二乙醇胺(MDEA)法溶液损耗小,净化度高,且对设备无腐蚀;聚乙二醇二甲醚(NHD)法不仅溶剂损耗低,净化度高,而且对设备腐蚀极小,能耗低,工艺流程简单,投资低。低温甲醇洗法工艺流程复杂,设备较多,投资高,但运行成本较低,而且溶液具有较好的热稳定性和化学稳定性,吸收选择性好,净化度高。脱碳方法的评述将会对合成氨工业生产中脱碳方法的选取起到一定的参考启示作用。 相似文献
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<正> 丙碳泵为丙碳脱碳工艺中主要设备之一。最近,我国有几家采用丙碳脱碳工艺流程的新建小联碱厂在开车过程中,不同程度地存在着丙碳泵运行失常的问题。主要表现为:电机电流过大;泵的出口压力偏高;有的泵甚至出现了断轴事故。 相似文献
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介绍2.7MPa碳丙脱碳新装置的流程、设备概况,生产运行情况以及如何解决硫堵问题。 相似文献
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本文针对采用丙碳脱碳法后碳化塔腐蚀日趋严重的问题,通过调研及有关电化学测试,对 PC(丙碳)、Cl~-、S~(2-)等因素对腐蚀的影响进行了研究与探讨,指出 S~(2-)含量过低是腐蚀恶化的主要原因,气体分布不均,操作温度经常超高对腐蚀也有重大影响,并提出缓解碳化塔腐蚀的有关防护措施。 相似文献
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某厂年产8万吨合成氨装置通过改造,扩大到11万吨,碳酸丙烯脂脱碳系统(简称碳丙)为适应合成氨能力增加的要求,也需进行改造。有两种方案可供选择,一种方案是按原设计吸收操作条件,扩建脱碳设备;另一种方案是充分利用原设计碳丙脱碳装置,根据碳丙脱碳的物理吸收特性,增加单位碳丙液溶解 CO_2量。第一种方案仿效原设计,增加吸收塔等设备,投资多一些,技术 相似文献
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本文实验测定丙碳稀溶液饱和蒸汽压数据,用数学回归方法建立了浓度-温度-饱和蒸汽压三者关联式,为丙碳脱碳溶剂损耗等工艺提供更简便的计算式。 相似文献
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Mixed solvents are a combination of chemical and physical solvents and have some advantages over traditional treating solvents for the removal of acid gases from gas streams. The solubility of H2S and CO2in a mixed solvent consisting of AMP (2-amino-2-methyl-l-propanol), sulfolane, and water has been measured at 40 and 100°C at partial pressures of the acid gas to 6000 kPa. The solubility in the mixed solvent was compared with the solubility in an aqueous solution of equivalent amine concentration. At solution loadings less than 1 mol acid gas/mol amine, the solubility of the acid gas is lower in the mixed solvent than in the corresponding amine solvent. At higher loadings, the trend is reversed and the solubility is greater in the mixed solvent. The results are rationalized in terms of the effect of the physical solvent component on the chemical reaction and physical vapor-liquid equilibria. The solubility model of Deshmukh and Mather was used to correlate the data. 相似文献
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Mixed solvents are a combination of chemical and physical solvents and have some advantages over traditional treating solvents for the removal of acid gases from gas streams. The solubility of H2S and CO2in a mixed solvent consisting of AMP (2-amino-2-methyl-l-propanol), sulfolane, and water has been measured at 40 and 100°C at partial pressures of the acid gas to 6000 kPa. The solubility in the mixed solvent was compared with the solubility in an aqueous solution of equivalent amine concentration. At solution loadings less than 1 mol acid gas/mol amine, the solubility of the acid gas is lower in the mixed solvent than in the corresponding amine solvent. At higher loadings, the trend is reversed and the solubility is greater in the mixed solvent. The results are rationalized in terms of the effect of the physical solvent component on the chemical reaction and physical vapor-liquid equilibria. The solubility model of Deshmukh and Mather was used to correlate the data. 相似文献
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Mixed solvents are a combination of chemical and physical solvents and are used for the removal of acid gases from gas streams. The solubility of CO2 in a mixed nonaqueous solution of methyldiethanolamine (MDEA) (50 wt.%) and triethylene glycol monomethj'l ether (TEGMME) (50 wt.%) has been measured at 40°C. The data are compared with solubility data of CO2 in pure TEGMME. The solubility of CO2 has been measured at 40°C and 100°C in an aqueous mixed solvent consisting of MDEA (40 wt.%) and TEGMME (40 wt. %) and water (20 wt.%) at partial pressures of CO2 up to 12 MPa. The solubility results were compared with the solubility in the nonaqueous mixed solvent and previously reported data of aqueous MDEA. The solubility model of Deshmukh and Mather was used to correlate the data. 相似文献
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测定了 Mg SO4- C2 H5 OH- H2 O三元系在 - 5℃ ,0℃ ,30℃ ,35℃及 5 0℃和 L i2 SO4- Mg SO4- C2 H5 OH- H2 O四元系在 2 5℃的互溶度和相关系。结果表明 :Mg SO4可使完全互溶的乙醇 -水体系分层 ,且 Mg SO4在两层液相中的含量明显不同。L i2 SO4和 Mg SO4作为混合盐在乙醇 -水体系中的行为表现出加和性。L i2 SO4本身在室温范围下不会使乙醇 -水体系分层 ,但适量的 L i2 SO4与 Mg SO4混合可使乙醇 -水体系的分层温度从33℃下降至 15℃以下。另一方面 ,乙醇的存在不仅可以降低 Mg SO4和 L i2 SO4的溶解度 ,而且可促成 Mg SO4· 7H2 O的脱水。该三元系中 Mg SO4的溶解度随温度升高而增大 ,在乙醇中几乎不能溶解。在 30℃ ,35℃和 5 0℃下体系的平衡固相为 Mg SO4· 6 H2 O,其他温度下是 Mg SO4· 7H2 O。提出一个经验公式对互溶性进行了关联 ,效果很好 相似文献
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Solubilities of argon were determined in acetone + water mixed solvent over the full range of composition using a static method. The gas solubilities were measured at three temperatures of 288.15, 298.15 and 308.15 K. The solubility dependence on the temperature in the mixed solvent was measured and discussed, and the similarity between excess quantities of mixed solvent and those of gas solubilities was examined. The order of gas solubility of argon in acetone + water mixed solvent at the three different temperatures was 288. 15 > 298.15 > 308.15 K in the composition range of 0 ≤ x22 ≤ 0.15. However, the reverse relationship with temperature was observed in the range of composition of 0.15 < x2 ≤ 1.0. For all solubility curves, maximum and minimum values of solubility were observed at lower temperatures, but not at higher temperatures. Furthermore, the excess Ostwald coefficients on the basis of volume fraction which express the non-ideality of gas solubility in non-ideal solutions were defined, and they were expressed by a polynomial equation of the Redlich-Kister (1948) type. 相似文献
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The solubility of carbon monoxide in phenol+ethanol mixed solvents at elevated pressures is reported in this article. The experimental results revealed the influence of pressure on the solubility of CO in phenol+ethanol mixtures. These mixtures are a poorer solvent for carbon monoxide. The solubility of CO is a linear function of pressure, and the extended Henry's constants were presented at different concentrations of phenol. The cubic Soave-Redlich-Kwong equation of state was used to correlate the experimental gas liquid equilibrium data and to predict the solubility of CO. At the same time, the binary interaction parameters, kO, for CO-phenol, CO-ethanol and phenol-ethanol systems were estimated by fitting experimental GLE data at 303.15 K and at 2.0-9.0 MPa. Hence, a model was suggested for the solubility of CO in phenol+ethanol mixed solvents. The agreement between experimental and calculated solubilities with the proposed model was rather satisfactory. 相似文献
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The solubilities of isophthalic acid (1) in binary acetic acid (2)+water (3) solvent mixtures were determined in a pressurized vessel. The temperature range was from 373.2 to 473.2K and the range of the mole fraction of acetic acid in the solvent mixtures was from x2 0 to 1. A new method to measure the solubility was developed, which solved the problem of sampling at high temperature. The experimental results indicated that within the temperature range studied, the solubilities of isophthalic acid in all mixtures showed an increasing trend with increasing temperature. The experimental solubilities were correlated by the Buchowski equation, and the calculate results showed good agreement with the experimental solubilities. Furthermore, the mixed solvent systems were found to exhibit a maximum solubility effect on the solubility, which may be attributed to the intermolecular association between the solute and the solvent mixture. The maximum solubility effect was well modeled by the modified Wilson equation. 相似文献
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对碳酸丙烯酯复合溶剂脱碳进行了研究,开发出新型的复合溶剂:碳酸丙烯酯十二乙氨基乙醇。这种复合溶剂吸收二氧化碳的能力是纯碳酸丙烯酯的1.72倍。实验选出其中两种最佳配比的复合溶剂进行动力学研究,获得其传质系数关联式,并考察了流体力学和温度对传质系数KL的影响。 相似文献