共查询到20条相似文献，搜索用时 62 毫秒
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谈沼气发电技术及其应用 总被引：4，自引：0，他引：4
谈沼气发电技术及其应用夏来庆，陈泽智，郑彪浙江大学能源工程系内燃机研究所（３１００２７）１沼气发电介绍．沼气发电始于７０年代初期。国外主要是为了合理、高效地利用在治理有机废弃物污染中所产生的沼气，普遍使用往复式沼气发电机组进行沼气发电。国外使用的沼气... 相似文献
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沼气发电机的使用与维修 总被引：1，自引：0，他引：1
沼气发电是随着沼气综合利用的开发而出现的一项沼气利用技术,由此而吸引了越来越多的沼气用户,特别是农村边远山区和用电不正常的地区,更向往利用沼气进行发电。所以很多单位和农户相继购进微型沼气发电机,但是因为沼气发电机和一般的汽 相似文献
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１０００ｋＷ沼气发电站的设计与运行梅先焘（上海七一研究所）１前言沼气发电是沼气利用的有效方式之一。凡是有大量有机废弃物的工厂，如酒精厂、糖厂、污水处理厂等，均有条件建设大型沼气发电站，以缓和生产用电紧张的矛盾，降低生产成本。浙江省内最大的酒精生产厂，... 相似文献
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浅析大型养殖场沼气发电——以山东民和养殖场沼气发电工程为例 总被引：1，自引：0，他引：1
随着对环境的日益重视,人们开始利用各种方式来减少工农业生产对环境的破坏。近十几年来,在各级政府有关部门和企业的帮助协调下,用于处理畜禽粪的大中型沼气工程纷纷上马。但是,相对于国外发达国家,我国利用沼气的发电工程还很少,据统计,我国沼气工程中沼气发电的比例不到3％。而德国近3000处沼气工程几乎都发电上网,其中98％的沼气工程是热电联产工程,发电余热用于沼气池加热。 相似文献
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基于熔融碳酸盐燃料电池的沼气高效发电系统研究 总被引：1，自引：0，他引：1
文章构建基于熔融碳酸盐燃料电池(molten carbonate fuel cell,MCFC)的沼气高效发电系统,集成燃气轮机、蒸汽底循环进行常压和增压沼气-MCFC联合循环系统的模拟计算,分析系统设计工况下发电性能,研究沼气甲烷浓度和工作压力对系统性能的影响.结果表明:沼气-MCFC联合循环系统具有较高的效率,可达... 相似文献
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在木薯淀粉加工中产生的大量木薯渣虽可以通过饲养家畜来解决,但仍剩余大量木薯渣堆放。本文介绍了云南省红枫农业公司的沼气利用工程,该分司利用木薯淀粉加工过程中产生的木薯渣和黄浆液生产沼气,再利用产生的沼气发电,实现了废弃物资源的良性循环。 相似文献
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欧洲沼气工程发展现状 总被引：28，自引：2，他引：28
本文介绍了最近几年欧洲各国有关沼气发展的政策法规、欧洲各国沼气产量和沼气利用方式。综述了欧洲沼气发酵工艺、沼气净化、沼渣沼液利用以及沼气发电等方面的技术现状。欧洲沼气发展经验表明,政策激励是目前沼气工程发展的原动力,凡是沼气发展迅速的国家,都有很好的政策激励。 相似文献
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Overland water and salt flows in a set of rice paddies 总被引：1，自引：0，他引：1
E. Playn O. Prez-Coveta A. Martínez-Cob J. Herrero P. García-Navarro B. Latorre P. Brufau J. Garcs 《Agricultural Water Management》2008,95(6):645-658
Cultivation of paddy rice in semiarid areas of the world faces problems related to water scarcity. This paper aims at characterizing water use in a set of paddies located in the central Ebro basin of Spain using experimentation and computer simulation. A commercial field with six interconnected paddies, with a total area of 5.31 ha, was instrumented to measure discharge and water quality at the inflow and at the runoff outlet. The soil was classified as a Typic Calcixerept, and was characterized by a mild salinity (2.5 dS m−1) and an infiltration rate of 5.8 mm day−1. The evolution of flow depth at all paddies was recorded. Data from the 2002 rice-growing season was elaborated using a mass balance approach to estimate the infiltration rate and the evolution of discharge between paddies. Seasonal crop evapotranspiration, estimated with the surface renewal method, was 731 mm (5.1 mm day−1), very similar to that of other summer cereals grown in the area, like corn. The irrigation input was 1874 mm, deep percolation was 830 mm and surface runoff was 372 mm. Irrigation efficiency was estimated as 41%. The quality of surface runoff water was slightly degraded due to evapoconcentration and to the contact with the soil. During the period 2001–2003, the electrical conductivity of surface runoff water was 54% higher than that of irrigation water. However, the runoff water was suitable for irrigation. A mechanistic mass balance model of inter-paddy water flow permitted to conclude that improvements in irrigation efficiency cannot be easily obtained in the experimental conditions. Since deep percolation losses more than double surface runoff losses, a reduction in irrigation discharge would not have much room for efficiency improvement. Simulations also showed that rice irrigation performance was not negatively affected by the fluctuating inflow hydrograph. These hydrographs are typical of turnouts located at the tail end of tertiary irrigation ditches. In fact, these are the sites where rice has been historically cultivated in the study area, since local soils are often saline-sodic and can only grow paddy rice taking advantage of the low salinity of the irrigation water. The low infiltration rate characteristic of these saline-sodic soils (an experimental value of 3.2 mm day−1 was obtained) combined with a reduced irrigation discharge resulted in a simulated irrigation efficiency of 60%. Paddy rice irrigation efficiency can attain reasonable values in the local saline-sodic soils, where the infiltration rate is clearly smaller than the average daily rice evapotranspiration. 相似文献
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车用发动机润滑油失效规律与更换周期研究 总被引：7，自引：0，他引：7
研究在正常使用条件下１０Ｗ／３０－ＱＣ级润滑油用于某型车用发动机时所表现的失效规律,确认期服从两参数Ｗｅｉｂｕｌｌ分布,并给出分布的尺度参数η和形状参数ｍ之最佳线性无偏估计（ＢＬＵＥ）同时,还为定量分析,计算车用发动机润滑油的使用可靠性和合理确定其更换周期提供了一套可供借鉴的方法,并给出了具体的计算实例。 相似文献
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赵国杰 《农业机械化与电气化》2011,(4):106-107
乡（镇）农技推广体系是农业发展的关键。介绍朝阳市农业技术推广体系的现状,针对目前体制及运行机制、服务手段等方面存在的问题,提出适合朝阳市乡（镇）农技推广体系改革与发展的对策,以期对全省农技推广体系改革和发展起到一些借鉴作用。 相似文献
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苑庆刚 《农业机械化与电气化》2010,(3):52-54
草莓果味酸甜爽口,营养价值高,为人们所喜爱的应市鲜果之一。由于草莓易受损伤和微生物侵染,因此其采收、贮藏过程极为重要。介绍草莓采收过程中的注意事项以及11种贮藏保鲜技术的实施步骤和操作方法,推介9种加工方式,为草莓产业化提供技术支持。 相似文献
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对引进的谷子新品种金谷子耐旱TG118进行品种比较试验和多点试种。结果表明：该品种抗旱、耐瘠、适应性强,稳产、高产、抗病抗风抗倒伏强,品质优良,粮草兼用,种植简单,省工易管;一般产量在6000kg/hm2以上,比当地主栽品种增产20%以上。最高产量达9450kg/hm2,适于在辽西北地区推广应用。 相似文献
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对《种子法》存在问题的探讨 总被引：1，自引：0，他引：1
李鹏 《农业机械化与电气化》2011,(6):129-130
《种子法》是我国种植业第一部法律。自实施以来,为依法加强种子管理提供了有力的法律支撑,促进我国种子产业发生翻天覆地的变化。但随着依法管理工作的深入和种子产业的快速发展,《种子法》及配套规章的一些问题逐步显现出来。对《种子法》及配套规章存在的问题进行深入分析,对需要进一步补充的章节以及需要调整的内容进行深入探讨,以求更加完善和明确。 相似文献
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瓦房店市是我国重要的水果生产基地,在国内水果生产领域占有重要地位。随着水果市场化的不断深入,如何满足和适应国内外市场需求成为瓦房店市水果生产的关键问题。从瓦房店市水果生产实际出发,阐述了实施水果生产标准化的必要性,提出了发展水果生产标准化的具体措施。 相似文献
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在新世纪,面对机遇和挑战,党的十六大把“社会更加和谐”作为全面建设更高水平的小康社会的一个重要目标。中国人素有社会和谐的理想;西方人自古也向往社会和谐;借鉴东西方两种和谐社会思想的经验、教训,构建社会主义和谐社会理论。 相似文献
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About 30 years have passed since the Government of Egypt embarked on implementing a series of large scale drainage projects. At present, about 3.8 million acres have been provided with drainage systems on the basis of systematic pre-drainage investigations and designs. The target is to provide drains in approximately 6.4 million acres in the Nile Valley and Delta.The implementation of the subsurface drainage system is carried out by the public sector and private contractors under direct supervision of governmental regional departments. The implementation process depends on many factors related to the drainage material, machinery, manpower, site requirements, farmers and organizations involved. Problems and constraints are sometimes challenging, however, the annual rate of implementation has gradually increased to 170,000 acre/year.This paper discusses the different aspects involved in the implementation process of drainage systems. The development in materials, machinery and construction technologies will be reviewed. Institutional and management factors are going to be also considered. 相似文献