Objective In order to find a new absorbent with good absorption performance,low solvent loss,and low energy consumption for CO2 capture,the preparation and performance of guanidine amino acid ionic liquids to capture CO2 in flue gas was investigated.Methods Three kinds of guanidine amino acid ionic liquids with low viscosity,namely[TMG][Lys],[TMG][Ala],and[TMG][Asp],were prepared using tetramethylguanidine(TMG)as a cation and lysine(Lys),alanine(Ala),and aspartic acid(Asp)as anions.The effects of anionic types on CO2 absorption were investigated.Results The alkaline[TMG][Lys]had a higher CO2 absorption,with a CO2 absorption capacity of 0.64 mol CO2/mol IL under the condition of atmospheric pressure,45℃,and 80 mL/min.The addition of water had a positive effect on the absorption of CO2.The absorption capacity of 30 wt%[TMG][Lys]aqueous solution increased to 0.99 mol CO2/mol IL and could still keep 0.81 mol CO2/mol IL after 5 absorption-desorption cycles.The decarbonization mechanism of[TMG][Lys]was analyzed by Fourier transform infrared spectroscopy(FT-IR)and nuclear magnetic resonance hydrogen spectroscopy(1 H-NMR).CO2 mainly reacts with the amino group on the anion to form carbamate to achieve efficient capture of CO2 in the flue gas.Conclusions It can provide reference for the development of new absorbents in industrial CO2 capture.

Objective The aim is to verify the stability of the fixed bed carbonyl sulfur(COS)hydrolysis process developed in the laboratory and catalyst in long-term operation under factory gas quality conditions,so as to provide basic data for process package development,industrial device design and application.Methods A 6 000 m3/d natural gas fixed-bed COS hydrolysis technology field test device was independently designed and constructed.The stability of COS hydrolysis rate of the test device for more than 16 000 h continuous operation was investigated by using the natural gas from the outlet of the wet desulfurization absorber of the factory as the test raw material.Results The experimental results showed that when the reaction temperature was greater than 70℃and 100℃respectively,and the volumetric space velocity was less than 6 000 h-1,the COS hydrolysis rate can be stably greater than 98%and 99%.The process and catalyst achievements were applied to the upgrading and renovation project of product gas quality in natural gas purification plants.The industrial unit operated stably for over 5 600 h,and the 72 h performance evaluation results of the unit showed that the hydrolysis reaction temperature was 100-120℃,the carbonyl sulfur mass concentration at the reactor outlet was less than 0.3 mg/m3,and the average hydrolysis rate reached 99.69%.Conclusions The natural gas fixed bed COS hydrolysis technology developed in the laboratory is stable and reliable,with high catalyst hydrolysis rate.It can provide a technical solution for selective desulfurization of natural gas with COS as the main organic sulfur component and high content in domestic sulfur-containing gas fields.

目的 商品气率是天然气净化装置重要的经济运行考核指标,阐述了关于提升商品气率的一些研究.方法 运用数学分析法,对天然气净化总厂万州分厂现有装置进行了建模分析,最终选择减少自耗气量的方案.根据分析结果,选择从热量消耗最大的部分,即重沸器蒸汽量开始研究,初步拟定两种方向的调整:一方面,通过提升M DEA质量分数、降低循环量的方式,降低单位溶液单次再生消耗的热量;另一方面,通过调整重沸器蒸汽量的方式,减少供给溶液体系中水分的冗余热量.结果 调整后有较好的节能降耗增产效果,自用气量降低了近25％,同时将商品气率提高至89％.结论 通过调整重沸器热量供给,并辅以其余调整,对减少自用气有明显的作用.

中国石油西南油气田公司天然气净化总厂万州分厂自2009年建成投产后,脱硫塔拦液情况频发,每次检修后的平稳运行时间逐年缩短,严重影响了装置的安全、平稳运行,制约了渝东北的产能发挥.针对该问题,收集和分析了10年来天然气净化装置胺液发泡的相关数据,认为造成发泡的主要原因是溶液被内部产生及外部带入系统的热稳定盐、油、脂、金属等杂质污染.针对上述因素,分别阐述了两种因素带来的不同现象及相应的控制措施,结合逐渐形成的经验教训对装置进行优化管理,现已连续平稳运行3年.

Since being put into operation in June 2009 ,the device of Wanzhou Natural Gas Purification Plant has got stable operation and reached design requirements . However , some problems occurred during the production .In combination with 5 year's operation situation of the purification plant ,the operation characteristics of the process were introduced ,some problems occurring during the production were analyzed ,and the corresponding improvement measures were proposed ,which could provide some references for the design and safe production of similar natural gas purification plants .

Based on the composition analysis of steam and condensation water of sulfur recovery unit in Wanzhou branch of Chongqing natural gas purification plant,this paper discussed these optimization measures.The steam ejector was redesigned to realize the application of stream cascading and the methods are used to realize the airtight recycling of condensation water such as recovering steam discharged from the condensation tank,recycling condensation water,recovering condensation water at partial pressure and optimizing the type of steam traps.The comprehensive energy consumption can be reduced from 1 303.38MJ to 1 188.23MJ per 1×104 m3 containing 1%(mol)of H2 S after optimization.Compared with the design which consumes 2 010MJ per 1× 104 m3 containing 1%(mol)of H2 S,the effect of energy saving is obvious.

Wanzhou natural gas purification plant was designed to treat high-sulfur natural gas by CPS sulfur recovery process with domestic autonomous intellectual property.So far from production,the unit has been in steady operation for more than two years.The result shows that the process design and the operation management are successful.This paper sums up the operation conditions of Wanzhou natural gas purification plant in recent years,mainly evaluates the operation conditions of desulfurization unit and sulfur-recovery unit.

<正>3台复盛SA75W型双螺杆式空气压缩机,单台最大产气量13m3/min,平时运行两用一备。1.排气温度超高(1)在高温季节循环水温度可能会偏高,使经过空冷器的压缩空气不能冷却到正常值,出现排气温度超高现象。一般应严控循环水进出口温度,冷却水进水温度应<32℃,出口温度应<35℃。若气温过高时,应及时调整循环水单元的操作,全启空冷风机或更换空气压缩机冷却循环水流程,将新鲜水作为冷却循

CPS sulfur recovery process that has independence intellectual property rights in domestic has applied in Wanzhou Branch for the first time.This text introduced the production status of sulfur recovery unit of Wanzhou Branch,moreover,it evaluated and summarized the unit characteristic and existent problems.This can be used for reference for design,construction and running of the same kind of sulfur recovery unit.