首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 15 毫秒
1.
The number of biogas injection plants is increasing. In Germany, the requirements for biogas injection are specified by DVGW G 260 and G 262. The most applied biogas upgrading technologies are the pressure swing adsorption and physical as well as chemical scrubbers. However, these technologies are usually not adapted to the particular injection parameters of a specific location. In this work the influences of pressure, temperature and further parameters are shown for the water and the Genosorb scrubber. For the simulations the software Aspen Plus was applied, and measurements are used for verification.  相似文献   

2.
依据气液相平衡理论,运用Aspen Plus软件,选用合适的单元操作模块,采用PENG-ROB物性计算方法,通过对沼气泡点、露点图的分析选择合适的模拟条件;在Aspen Plus软件上对沼气低温净化工艺进行模拟,并根据模拟数据分析压力、温度对低温净化工艺的效果的影响。  相似文献   

3.
    
Significant attention has been given to biogas production, purification and upgrading as a renewable and clean fuel supplement. Biogas is a product of an anaerobic digestion process comprising methane, carbon dioxide, and trace amounts of other gases. Biogas purification removes trace gases in biogas for safe utilisation. Biogas upgrading produces methane-rich biogas by removing bulk carbon dioxide from the gas mixture. Several carbon dioxide removal techniques can be applied for biogas upgrading. However, chemical absorption of carbon dioxide for biogas upgrading is of special significance due to its operation at ambient or near ambient temperature and pressure, thus reducing energy consumption. This paper reviews the chemical absorption of carbon dioxide using amine scrubbing, caustic solvent scrubbing, and amino acid salt solution scrubbing. Each of these tech-niques for biogas upgrading is discussed. The paper concludes that an optimised implementation of the chemical absorption techniques for biogas upgrading requires further research.  相似文献   

4.
    
Biogas upgrading for removing CO2 and other trace components from raw biogas is a necessary step before the biogas to be used as a vehicle fuel or supplied to the natural gas grid. In this work, three technologies for biogas upgrading, i.e., pressured water scrubbing (PWS), monoethanolamine aqueous scrubbing (MAS) and ionic liquid scrubbing (ILS), are studied and assessed in terms of their energy consumption and environmental impacts with the process simulation and green degree method. A non-random-two-liquid and Henry's law property method for a CO2 separation system with ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([bmim][Tf2N]) is established and verified with experimental data. The assessment results indicate that the specific energy consumption of ILS and PWS is almost the same and much less than that of MAS. High purity CO2 product can be obtained by MAS and ILS methods, whereas no pure CO2 is recovered with the PWS. For the environmental aspect, ILS has the highest green degree production value, while MAS and PWS produce serious environmental impacts.  相似文献   

5.
为了提高沼气热值,设计沼气水洗净化制取压缩生物质甲烷试验,并对工艺参数和设备进行合理的设计和选型。首先,利用脱硫塔和过滤器,去除沼气中硫化氢和粉尘等杂质;然后,将沼气加压输送至水洗塔进行净化处理,去除二氧化碳;最后,把净化后获得的生物质甲烷加压灌装入气瓶。经检验,产品气中甲烷浓度达到88.1%,热值得到极大提高。  相似文献   

6.
    
The mass balances of countercurrent gas permeation modules for the separation of multicomponent gas mixtures are formulated as a boundary value problem, using the ideal gas law and isobaric isothermal stages. The balances are extended for the common three-stage gas permeation process for the upgrading of biogas. The solution is calculated with MATLAB's BVP4C boundary value solver. The process is optimized by means of the FMINCON SQP-algorithm towards lowest power consumption. Parameter variations are conducted, highlighting the impact of product and lean-gas quality setpoints, biogas composition, membrane surface and selectivity, permeate compression, and choice of compressor model on the energetic optimum.  相似文献   

7.
    
Anaerobic digestion (AD) involves a series of biological processes in which organic material is broken down and transformed into biogas. A simulation model of the AD process in treating food waste to produce biogas was developed using Aspen Plus software. The components list, thermodynamic property package, reaction list, reactor model, and process condition were specified in Aspen Plus. Sensitivity analysis was performed to study the effect of hydraulic retention time and changes in food waste composition on the biogas production. The methane composition in biogas decreased when the hydraulic retention time was increased which is due to the reduction of substrate consumption during the AD process. The process model is able to represent the AD process and provides a good approximation on the production of biogas under various process operating conditions.  相似文献   

8.
Aspen Plus在煤焦油复杂组分精馏中的应用   总被引:1,自引:0,他引:1  
杨云  许祥军 《上海化工》2009,34(12):15-18
在制备净化煤焦油沥青的过程中,净化沥青和轻质油组分的精馏分离是关键步骤之一。通过对组分的合理简化,用Aspen Plus对这一复杂组分精馏过程进行模拟,为试验及设计提供参考。  相似文献   

9.
苯回收塔工艺过程模拟   总被引:2,自引:0,他引:2  
利用AspenPlus软件,选取BK10模型,对苯回收塔进料状态改变以后的运行状况进行了模拟计算。结果表明:进料位置在设计的17块塔板时,顶产出量应在9520—9620kg/h之间变化,回流比在0.69以上即可达到要求的分离精度。进料位置调整为23块板时,塔顶产出量应在9540.9620kg/h之间变化,回流比在0.61以上可以达到要求的分离精度。稳定控制塔顶产出量,可以有效提高分离精度。改变进料位置、优化操作参数可有效降低装置能耗。  相似文献   

10.
霍月洋 《广州化工》2015,(5):123-124,135
采用化工流程模拟软件Aspen Plus建立固体物质溶解度的计算模型,并利用灵敏度分析功能研究不同温度下的固体溶解度。以计算不同温度下KNO3和Na Cl在水中的溶解度为例说明了计算过程,模拟计算结果与文献数据的最大偏差分别1.65%和1.12%,平均相对偏差分别为0.81%和0.69%,吻合良好。研究结果表明本文建立的固体物质的溶解度计算方法是可行的,可为工业生产提供可靠的数据。  相似文献   

11.
IGCC示范工程煤气化炉的数值模拟   总被引:3,自引:1,他引:3  
采用Aspen Plus流程模拟软件对某拟建的IGCC示范工程的德士古煤气化炉进行数值模拟,通过考虑碳的不完全转换对计算流程进行了改进,并运用CPD模型预测煤热裂解的产物分布.研究了煤气化炉的重要操作参数(即水煤浆浓度、氧煤比、气化压力和气化温度)对气化结果的影响.在计算区间内,发现高浓度水煤浆浓度范围内,随浓度的增加,煤气的主要成分(H2+CO)的总含量增加.气化温度增大到1400℃左右时,煤气的主要成分随气化温度的进一步增加会趋于一个恒定值.  相似文献   

12.
为实现生物质能量的高效清洁利用,本研究基于两段式富氧气化系统改进燃气品质,并将获得的洁净高热值可燃气用于燃气轮机燃烧.通过Aspen Plus模拟研究分析了氧体积分数、气化温度对气化特性、燃机运行特性的影响,研究结果证实了生物质气化燃气在燃气轮机应用的可行性,并发现氧体积分数提高对改善生物质气化燃气品质及系统发电效率具...  相似文献   

13.
研究了从芳烃抽余油中分离甲基环戊烷的方法和流程,首先用Aspen Plus软件模拟了精馏法提取甲基环戊烷的分离结果。通过模拟计算得到了最优的设计参数、操作条件、各塔冷凝器、再沸器的热负荷。在此基础上,还模拟了用甲醇作共沸剂共沸精馏分离得到甲基环戊烷的结果,获得了最优的设计参数和操作条件。  相似文献   

14.
GE水煤浆气化工艺是目前广泛采用的煤气化技术.通过对GE水煤浆气化全过程的模拟,可以加深对工艺包的理解,对气化炉进行优化控制,同时为工艺设计和生产操作提供指导.文中根据GE水煤浆气化的工艺特点,将水煤浆气化过程分为煤的裂解与气化、激冷与排渣、碳洗、闪蒸与灰水处理等基本单元过程,在对单元过程模型反复核算、改进的基础上采用...  相似文献   

15.
张彩珠  王春燕  陈珊  魏顺安 《化工进展》2013,32(6):1278-1282
燃煤发电是我国的主要电力方式,分析燃煤电厂的能量利用情况对节能减排有重要作用。本文以国际典型亚临界燃煤电厂和我国西南地区某亚临界燃煤电厂为计算实例,结合Aspen Plus软件和有效能分析法,对其整个热力过程进行系统模拟计算和能量分析,得出每个设备的有效能损失。结果表明,热力过程中有效能损失最大的部位在锅炉;锅炉中有效能损失最大的是煤的燃烧过程,其次为锅炉受热面的换热过程。通过对国内外两个电厂的比较,发现国内亚临界燃煤电厂有效能效率较国外低约6个百分点。  相似文献   

16.
采用模拟软件Aspen Plus对某厂大型煤化工甲醇四塔精馏过程进行稳态模拟计算和分析,结果表明,应用物性方法 UNIFAC-DMD能有效模拟汽液平衡数据,模拟结果与工厂采集数据吻合良好。进行了常压塔侧线抽提位置分析、回流比对产品各组分浓度影响及精馏塔水力学分析等研究,提供了可行的精馏操作方案。  相似文献   

17.
借助乙醇氨化合成乙胺的动力学模型,通过Aspen plus软件对固定床和精馏塔分别进行了模拟计算,得到了固定床较优的操作条件。另外利用DSTWU和RADFRAC精馏塔模型对产品的分离进行了模拟计算,确定了回流比为5.4和塔顶馏出物与进料的质量比为0.65时,得到乙胺的纯度达99.95%。  相似文献   

18.
《云南化工》2017,(11):47-50
基于一种新型的煤焦油粗酚产品分离加工方案,通过Aspen Plus对其进行了流程模拟,并通过对关键因素的灵敏度分析,讨论了相应因素的变化趋势,确定了其最优的加工方案,并给出了下一步工作建议。  相似文献   

19.
PVA生产中醋酸甲酯水解工序全流程模拟   总被引:2,自引:0,他引:2  
利用ASPEN PLUS软件和醋酸甲酯痧解催化精馏工艺研究的小试数据,对PVA生产中醋酸甲酯水解工序的全流程进行了模拟计算,并给出了中试结果,模拟计算结果表明:采用催化精馏工艺可使流程中物料循环系数大大降低;满足原分离指标的条件下,分离设备的规模可养活;不改变分离设备的条件下,仍可达到原来的分离要求,而且能节约大量能量。  相似文献   

20.
张希 《浙江化工》2020,(1):24-27
安全阀是压力容器安全保护的最后一道物理保护措施,广泛应用于石油化工企业.安全阀计算工况众多,计算公式容易混淆,为正确选型带来麻烦.简单介绍了Aspen Plus软件Safety Analysis功能在安全阀计算中的应用.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号