合成氨厂提氢尾气提纯液化天然气技术应用

针对目前合成氨厂生产过程中存在的问题,利用低温制冷液化提纯技术,从提氢后尾气中提纯天然气,给出了具体方案和工艺流程,并进行了投资及经济效益预算。该工艺大大提高了提氢尾气的综合利用,经济效益显著,同时减少了环境污染。     

兰炭尾气资源化利用技术途径

针对兰炭尾气的组分特点,结合当前工艺技术水平与国内外市场情况,提出兰炭尾气制天然气、合成氨、甲醇、提氢等适合兰炭尾气资源化利用的技术途径,随着各项工艺技术的相继开发与实施,必将对洁净煤技术的进一步发展产生深远的影响.     

焦炉煤气PSA提氢尾气的综合利用

介绍了焦炉煤气PSA提氢尾气的利用方式和用其制天然气的原理及工艺流程,从当前市场环境来看,使用焦炉煤气PSA提氢尾气制天然气,前景可观。     

湖北三宁合成氨尾气变成新能源

近年来,湖北三宁化工股份有限公司致力于节能减排和清洁环保事业成效卓著。继成功实施化工生产的余热发电、废水零排放等节能减排项目之后,近日,该公司首批318个职工家庭用上了湖北三宁化工提供的新型清洁能源——合成氨生产膜提氢尾气。     

新系统提氢装置运行总结

我公司1999年元月份建成投产的二期扩建工程,设计能力为年产合成氨120 kt,尿素200kt.提氢系统采用了膜分离技术,从合成氨吹除气中提取高浓度氢气,并将其返回合成氨系统利用.降低了原煤消耗,使合成氨制造成本比老系统有明显下降,但是该提氢装置投运不到一年,由于多种原因,使中空纤维膜损坏而被迫停运,现将提氢装置的运行情况及存在的问题分析如下.     

关于合成氨放空气、弛放气(两气)回收LNG装置的生产运行总结

介绍了合成氨放空气、弛放气(两气)回收液化天然气(LNG)装置的项目背景,以及该装置的生产原理和工艺情况,利用原料气中各组分沸点的不同,对各组分进行分离,得到LNG产品.LNG产品送LNG储罐供销售;合成氨岗位的放空气经过膜提氢岗位回收后,氢氮混合气回压缩机一段加压后返回系统重复使用;惰性废气用于分子筛吸附器再生后送往...     

四川空分设备厂研制成功合成氨尾气提氢装置

<正> 为发展节能产品,为化肥工业技术改造服务,四川空分设备厂发挥自已在深冷方面的技术优势,在无锡县化肥厂配合下,研制了一套利用小氮肥合成弛放气余压,经过深冷分离,从尾气中提氢的装置,能将尾气中90％的氢提取出来,返回合成系统,可增产合成氨5％。     

金属贮氢法在合成氨厂的应用

金属贮氢法是回收、净化获得高纯氢的新技术。具有融回收、净化、压缩、贮运于一体的优点,见长于其它提氢技术。可以广泛应用于合成氨厂和所有含氢工业尾气的工厂。对于综合利用能够取得理想的效益。     

金属贮氢法在合成氨厂的应用

金属贮氢法是回收、净化获得高纯氢的新技术。具有融回收、净化、压缩、贮运于一体的优点，见长于其它提氢技术。可以广泛应用合成氨厂和所有含氢工业尾气的工厂。对于综合利用能够取得理想的效益。     

合成氨尾气联产LNG工艺分析

为充分利用氨合成尾气中的甲烷、氨、氢等资源,采用膜分离技术、分子筛脱水技术和低温精馏技术将尾气中各个有价值的组分逐一分离出来,将甲烷制成LNG,实现合成氨尾气的利用价值最大化,同时成功地实现了合成氨尾气的零排放。本文主要阐述了合成氨尾气联产LNG基本原理与工艺流程,为项目实施提供理论指导。     

炭质吸附剂吸附储存天然气浅谈

介绍了近年来利用炭质吸附剂吸附储存天然气的研究。结果表明：炭质吸附剂对于甲烷的理论吸附量与２０ＭＰａ下压缩天然气的量基本相当,但自前所生产的活性炭尚不能达到如此高的吸附量：炭质吸附剂的孔结构是影响甲烷吸附储存量的主要因素,此外吸脱附热效应以及天然气中其他杂质的存在对甲烷的吸附储存也有一定的影响。     

贮存天然气用高密度微孔炭质吸附剂的研究

综述了贮存天然气用高密度微孔炭质吸附剂的研制方法、工艺条件及产品性能。结果表明：选择合适的粉炭、粘结剂及其用量,其吸附贮存甲烷的能力能达到蒙特卡罗（GCMC）模拟计算的结果。     

EFFECT OF HIGH PRESSURE ON A CO-CULTURE FOR THE PRODUCTION OF METHANE FROM COAL SYNTHESIS GAS

It has been demonstrated that coal synthesis gas may be converted to methane by anaerobic bacteria. One possible pathway involves the formation of acetate from carbon monoxide by bacteria such as P. productus. Acetate can be reacted to methane by methanogens, such as Methanothrix sp. Whenever a gas needs to react in a liquid phase, reaction rates are severely limited by mass transfer of the gaseous substrates into the liquid medium. Operation at high pressure increases the gas transport and solubility and, thus, the reaction rates. However, high concentrations of dissolved carbon monoxide are known to effects of high pressure on the performance of co-cultures capable of converting synthesis gas into methane.     

EXPERIMENTAL INVESTIGATION ON GAS HYDRATE FORMATION IN PRESENCE OF ADDITIVE COMPONENTS

Additives were used to increase gas hydrate formation rate and storage capacity. Experimental tests of methane hydrate formation were carried out in surfactant water solutions in a high-pressure cell. Sodium dodecyl sulfate (SDS) and alkyl polysaccharide glycoside (APG) were used to increase hydrate formation. The effect of SDS on hydrate formation is more pronounced compared APG. Cyclopentane (CP) also improves hydrate formation rates while it cannot increase methane gas storage capacity.     

柯克亚凝析气田气井增产技术

新疆柯克亚凝析气田勘探初期遭受了3口喷井的破坏和其后近20年的衰竭式开采,地层压力大幅度下降,地层反凝析现象严重,严重污染了井筒周围的储层,造成渗流阻力增大,致使多口气井停产或无法正常生产,影响气藏的整体开发效果。针对此现状,实施了气井增产配套技术,主要有:单井注气吞吐、高压天然气间歇气举、排液采气、优化管柱,取得了显著增产效果,为同类气田高效开采,提高采收率提供了有效途径。     

SCHEMES OF GAS PRODUCTION FROM NATURAL GAS HYDRATES

Natural gas hydrates are a kind of nonpolluting and high quality energy resources for future, the reserves of which are about twice of the carbon of the current fossil energy (petroleum, natural gas and coal) on the earth. And it will be the most important energy for the 21st century. The energy balance and numerical simulation are applied to study the schemes of the natural gas hydrates production in this paper, and it is considered that both depressurization and thermal stimulation are effective methods for exploiting natural gas hydrates, and that the gas production of the thermal stimulation is higher than that of the depressurization. But thermal stimulation is non-economic because it requires large amounts of energy. Therefore the combination of the two methods is a preferable method for the current development of the natural gas hydrates. The main factors which influence the production of natural gas hydrates are: the temperature of injected water, the injection rate, the initial saturation of the hydrates and the initial temperature of the reservoir which is the most important factor. 1 Lei Huaiyan, Wang Xianbin. Current Situation of Gas Hydrates Research and Challenges for Future. Acta Sedimentological Sinica, 1999, 17 (3)2 Shi Dou, Zheng Junwei. The Status and Prospects of Research and Exploitation of Natural Gas Hydrate in the World. Advance in Earth Sciences, 1999, 14 (4)3 Chen Huifan4g. Prediction of the Conditions for the Forming of Natural Gas Hydrate. Journal of Xi'an Petroleum Institute, 1994, 9 (1)4 Yao Yucheng, Yin Fushan. Progressin Study of Natural Gas Hydrates. Progress in Chemistry, 1997, 9 (3)5 Zhao Shengeai. Current Situation of Gas Hydrate and Our ??Country's Policy. Advancein Earth Sciences, 2002, 17 (3)6 Zhou Huaiyang, Peng Xiaotong. Development in Technology of Prospecting and Exploitation for Gas Hydrates. Geology and Prospecting, 2001, 38 (1)7 Zhu Yuenian, Shi Buqing. Control Effects of Natural Gas Hydrates on Oil and Gas Accumulation and Reservoir Preservation. Natural Gas Industry, 2000, 20 (3)8 Wim J A M Swinkels, Rik J J Drenth. Thermal Reservoir Simulation Model of Production from Naturally Occurring Gas Hydrate Accumulations. SPE 565509 Moridis G J, Collett T S, Dallimore S R, Tohru Satoh. Numerical Studies of Gas Production from Several CH_4-Hydrate Zones at the Mallik Site. LBNL 50257. Mackenzie Delta, Canada     

合成气油改气技术方案选择

采用天然气非催化部分氧化法，对合成气装置进行天然气取代渣油的技术改造，降低综合能耗，拟采用德士古非催化部分氧化法工艺技术，将渣油部分氧化工艺原料改为天然气，在原有气化装置上进行少量局部改造，其优点是改动量小，改造容易，可以采用原有3．1Mpa(G)压力的气化炉，仅更换烧嘴，增加天然气压缩机，原料预热器，天然气分离器，工艺管线及仪表等，由于CO含量降低，需要重新调整变换的工艺操作参数，CO变换催化剂需要改成Fe-Cr型催化剂。     

天然气井输出管道中流动和换热的数值模拟

建立了模拟气井内天然气向地面流动时其热力参数沿流程变化规律的模型。据此模型探讨了对天然气井实施保温措施的方案,并预估了采用某些保温措施的效果。     

燃气预热器内漏原因分析及预防措施

燃气预热器由于电化学腐蚀内漏,引起一段转化炉燃烧天然气压力高触发了燃气压力高联锁,造成了一段转化炉停车事故。经过对燃气预热器内漏原因进行分析,加强了预防措施,防止类似事故再次发生。     

柔性复合材料改造城市燃气管道性能研究

在西气东输中采用柔性复合材料改造城市原有煤气管道接头来输送天然气是一种经济、实用的方法.本文介绍了一种高性能的聚氨酯-涤纶布-铝箔复合材料内衬的煤气管道接头密封连接结构,还介绍了"诺迪霸工艺",并按有关试验标准,对管道接头密封结构进行了气密性、耐气压、抗弯曲、抗剥离强度及人工加速老化等试验.试验结果证明,这种结构形式和施工工艺性能优良、安全可靠,能够满足天然气输送.