共查询到10条相似文献,搜索用时 109 毫秒
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苏里格气田试气队伍节能减排工作现状及改进建议 总被引:1,自引:1,他引:0
苏里格气田试气队伍因涉及数家企业单位,节能减排工作有其特殊性和复杂性。通过调查试气过程中的排污状况,分析了其节能减排工作中出现的几个问题,如计量粗放、管理薄弱、措施简单等,提出了健全管理制度,完善计量系统,鼓励技术研究,加强自主创新,创建统一平台,依靠丙方监管等措施,以促进其节能减排工作健康有序地发展。 相似文献
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The goal of this paper is to find methodologies for removing a selection of impurities (H2O, O2, Ar, N2, SOx and NOx) from CO2 present in the flue gas of two oxy-combustion power plants fired with either natural gas (467 MW) or pulverized fuel (596 MW). The resulting purified stream, containing mainly CO2, is assumed to be stored in an aquifer or utilized for enhanced oil recovery (EOR) purposes. Focus has been given to power cycle efficiency i.e.: work and heat requirements for the purification process, CO2 purity and recovery factor (kg of CO2 that is sent to storage per kg of CO2 in the flue gas). Two different methodologies (here called Case I and Case II) for flue gas purification have been developed, both based on phase separation using simple flash units (Case I) or a distillation column (Case II). In both cases purified flue gas is liquefied and its pressure brought to 110 atm prior to storage.Case I: A simple flue gas separation takes place by means of two flash units integrated in the CO2 compression process. Heat in the process is removed by evaporating the purified liquid CO2 streams coming out from both flashes. Case I shows a good performance when dealing with flue gases with low concentration of impurities. CO2 fraction after purification is over 96% with a CO2 recovery factor of 96.2% for the NG-fired flue gas and 88.1% for the PF-fired flue gas. Impurities removal together with flue gas compression and liquefaction reduces power plant output of 4.8% for the NG-fired flue gas and 11.6% for the PF-fired flue gas. The total amount of work requirement per kg stored CO2 is 453 kJ for the NG-fired flue gas and 586 kJ for the PF-fired flue gas.Case II: Impurities are removed from the flue gas in a distillation column. Two refrigeration loops (ethane and propane) have been used in order to partially liquefy the flue gas and for heat removal from a partial condenser. Case II can remove higher amounts of impurities than Case I. CO2 purity prior to storage is over 99%; CO2 recovery factor is somewhat lower than in Case I: 95.4% for the NG-fired flue gas and 86.9% for the PF-fired flue gas, reduction in the power plant output is similar to Case I.Due to the lower CO2 recovery factor the total amount of work per kg stored CO2 is somewhat higher for Case II: 457 kJ for the NG-fired flue gas and 603 kJ for the PF-fired flue gas. 相似文献
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Carlos A. Grande Alírio E. Rodrigues 《International Journal of Greenhouse Gas Control》2008,2(2):194-202
One of the most important sources of CO2 emissions are the fossil-fuel fired plants for production of electricity. Removal of CO2 from flue gas streams for further sequestration has been proposed by the International Panel on Climate Change experts as one of the most reliable solutions to mitigate anthropogenic greenhouse emissions. When natural gas is employed as fuel, the molar fraction of CO2 in the flue gas is lower than 5% causing serious problems for capture. The purpose of this work is to present experimental validation of an Electric Swing Adsorption (ESA) technology that may be employed for carbon capture for low molar fractions of CO2 in the flue gas streams. To improve energy utilization, an activated carbon honeycomb monolith with low electrical resistivity was employed as selective adsorbent. A mathematical model for this honeycomb is proposed as well as different ESA cycles for CO2 capture. 相似文献
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Xiaoyu Liu Bing Zhu Wenji Zhou Shanying Hu Dingjiang Chen Charla Griffy-Brown 《International Journal of Greenhouse Gas Control》2011,5(5):1240-1249
China's calcium carbide output has dominated the global market for several years, driven by the demand for PVC (polyvinyl chloride), a fundamental polymer material and also the primary downstream product of calcium carbide in China. The fast growth of this energy-intensive industry leads to an inevitable increase in CO2 emissions. However, there is a large reduction potential with process improvement in this industry which is currently characterized by widespread outdated facilities. In this study, we attempt to assess the reduction potential of CO2 emissions in China's calcium carbide production, based on the analysis of CO2 emission patterns and estimation of the emission amount. Three scenarios regarding process improvement are employed to conduct this assessment. The results imply that the cumulative CO2 abatement in the Current Policy Scenario and in the Strengthened Policy Scenario from 2008 to 2020, compared with the Baseline Scenario, are 89.0 and 107.6 million t, respectively. The specific measures and policy implications to achieve this potential are also discussed in the article. 相似文献
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为有效抑制生活垃圾在机械炉排炉焚烧过程中NOX的产生,有研究者提出采用烟气回流技术可以有效抑制NOX的生成和排放。目前关于烟气回流技术的理论研究和数值模拟较多,而基于实际工程应用的研究较少。选择了烟气回流工艺在山东省某生活垃圾焚烧项目上的应用情况进行研究,从烟气回流工艺的技术原理、排放指标、运营数据和经济性等方面进行了分析,同时也总结了本工艺在应用过程中需注意的事项。研究表明,采用烟气回流工艺的#3炉引风机出口NOX平均排放和氨水平均用量比未采用烟气回流工艺的#1炉,分别降低了25.8%和43.7%,且NOX浓度波动与烟气含氧量密切相关。总体上,烟气回流工艺的使用能够有效抑制NOX的产生,并且同时减少了氨水等物料的消耗,降低了运营的成本。但是当进入焚烧炉的垃圾品质出现急剧恶化的情况下,会影响焚烧炉的燃烧工况而使烟气回流量降低,导致NOX减排效果下降。 相似文献
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本文运用C-D生产函数修正传统的LMDI指数分解法并构建Tapio及交叉脱钩模型,结合灰色预测模型GM(1, 1),实证分析2006—2025年京津冀钢铁领域碳排放的碳强度、驱动因素、脱钩指数及协同关系。结果发现:(1)京津冀从“十一五”到“十四五”时期钢铁领域碳排放由快速增长变为缓慢增长,北京市和天津市钢铁领域的碳排放强度均低于地区平均水平,河北省则高于平均水平;(2)碳增排因素为能源消费碳强度和资本投入,碳减排因素为能源强度和技术进步,劳动投入逐渐从碳增排效应转变为碳减排效应;(3)京津冀钢铁领域碳排放与工业增加值未实现脱钩,且京津冀三地间脱钩协同关系多表现为不协同。鉴于京津冀城市群钢铁领域聚集,需推进钢铁领域实现协同脱钩,积极引领“双碳”行动。 相似文献