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彭贵喜 《农业机械化与电气化》2009,(2):83-84
针对法库县农户沼气池出料难的问题,引进沼气池出料车加以解决。介绍该出料车的结构、工作原理和主要技术参数,指出其工作过程中的注意事项,并根据使用经验提出了改进建议,以使该出料车更好地应用于沼气池的出料、除渣、排污,从而促进农村新能源建设。 相似文献
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沼气的综合利用可以改善农村的生产、生活环境,降低生产成本.提高经济效益,它绿色环保,是发展农业低碳循环型经济的重要基础工程,是当前社会主义新农村建设的重要内容.沼气池使用中需要进行定期清池换料,以保持沼气池的产气效率,如人工作业,人员需下到沼气池内,既不卫生,而且费时费工,如操作不当还会危及人生安全,机械式沼液沼渣出料车(全文简称出料车)的研发成功解决了这些问题,同时该出料车还实现了将废弃沼液进行农田喷洒施肥作业的功能. 相似文献
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农村户用秸秆沼气池使用中需要进行定期清池换料,以保证沼气池正常产气使用。其中,清池出料工作尤为重要,其工作过程繁琐,人工作业苦、脏、累、危。农村户用秸秆沼气池清池出料操作中需要进行浮壳破碎、秸秆纤维沼渣清除和沼液、沼渣抽吸去除等工作步骤。针对农村户用秸秆沼气池清池出料工作的特点,介绍了相应作业机械的设计,旨在通过机械作业解决农村户用秸秆沼气池的清池出料问题,提高工作效率,减轻劳动强度,促进农村户用秸秆沼气池的推广使用。同时,针对清秸秆抓斗工作的特殊性,对抓斗的形状及运动应用三维软件进行运动仿真分析,优化了抓斗的形状和工作轨迹,以防止抓斗在工作中损坏沼气池内壁。 相似文献
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文章针对农村户用沼气池建设中存在的日常出料困难的问题,研究出手压式人工出料装置.该技术主要利用杠杆和加压原理来降低作业强度,提高吸粪效果,使发酵间底部的发酵料液在压力作用下,快速顺着抽渣管上行并从溢流口处流入粪桶,达到人工出料的目的. 相似文献
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针对农村家用水压式沼气池在应用中存在的一些问题,我们基于《农村家用水压式沼气池标准图集》(以下简称《图集》),研制了一种低层进、出料沼气池,它有别于《图集》中的“中层进料、中层出料和底层出料。”自1986年开始示范推广,到目前为止,全县共建这种池2694口,很受用户欢迎,现简介如下: 相似文献
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《Journal of Agricultural Engineering Research》1998,69(3):249-254
A model to represent the discolouration of dried powder of carrots as a function of temperature was developed. Two types of carrots, Asian and European, containing large amount of lycopene and β-carotene, respectively, were tested. The dried powder was stored under an atmosphere with O2and at three different temperatures, 5,20 and 35°C. The surface colour of the powder was monitored during storage by a Hunter colour ratioa/b. In the proposed model, the rate of oxidation was assumed to be represented by the product of the fraction of concentration of oxidized pigment at arbitrary time and a specific rate of oxidation of pigment. The rate parameters in the proposed model were calculated by fitting the experimental data with smooth curves by trial and error at the end of the induction period but before discolouration took place. The frequency constant and activation energy, expressing the temperature dependence of the rate parameters, were expressed by the Arrhenius relation. The simulation results of a Hunter colour ratioa/bof dried powder at 25°C showed good agreement with the experimental data, suggesting that the proposed model was effective for the prediction of discolouration of dried powder of both types of carrot. The use of the induction period in the manner described may enable the shelf life of dried powder to be predicted. 相似文献
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感官检验棉花的品级,这是农村常见的一种检测手段.它的一个主要特点就是存在不确定性.这是由于检验员的品级检验水平存在一定的差异,其中有很多因素制约着检验的结果.文章对影响感官检验结果的因素进行了系统的分析. 相似文献
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从灾害经济学的角度探讨了城镇供水优化调度的必要性和可能性,认为在缺水不可避免的情况下,对供水进行优化调度可以减小缺水带来的损失,产生较好的减灾效益,特别是可以大大减小严重干旱的灾害效应。并根据水资源的特性,提出了缺水损失的计算模式以及优化调度的原则和方法。 相似文献
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The fractional outflow rate of water from the rumen, measured as the rate of disappearance of the chromium complex of ethylenediamine tetra-acetic acid, was related to a number of dietary factors. A multiple regression equation was derived which expressed fractional outflow rate as a function of the intakes of dry matter, ash, acid-detergent fibre and crude protein.The data analysed consisted of 243 observations for sheep on 59 diets, including forage, concentrate and mixed diets. The ranges covered by the data were: fractional outflow rate 0.7–3.6 day?1; dry matter intake 560–1400g/day; ash 4–30%, acid-detergent fibre 7–41%, crude protein 5–26 % of dry matter; there were no observations for sheep of less than 34 kg liveweight.The equation accounted for 56·3 % of the total variance. Between-sheep variance could not be calculated for the whole of the data but was undoubtedly substantial since, for a sixth of the data, it was known to account for 38 % of the total variance. 相似文献