共查询到20条相似文献,搜索用时 125 毫秒
1.
2.
主要论述抽油机井在伴生气影响,泵筒不能充满,泵效低下,影响油井产量,造成油井系统效率低下,为此利用机械式工具进行防气,达到提高油井产量,提高抽油机井系统效率的目的。 相似文献
3.
遗传算在螺旋输送机优化设计中的应用 总被引:1,自引:0,他引:1
以重量最小和传动效率最大为双优化目标,建立了螺旋输送机优化模型,并利用遗传算法进行优化求解,使优化求解方便快捷,效率提高. 相似文献
4.
本文利用(火用)的概念计算合成工段合成氨反应热回收装置的(火用)效率,并与传统的热效率、热回收率计算结果相比较,来评价其热能利用的程度,指出了提高(火用)效率的途径。 相似文献
5.
6.
在新时期科技的发展带动了机采系统技术的进步,以机采井为主要生产方式的油田也随之增多,在这样的情况下机采系统效率直接地关系着机采井的能源利用水平,机采井能源利用的核心指标,所以必须及时的对机采系统效率技术进行优化与提高,让机采井的生产能够达到要求,创造出更多的良性影响力。基于此,本文将对提高油田区块机采系统效率技术展开研究。 相似文献
7.
8.
随着油田外发的不断深入,原油产量逐年下降,自产天然气量也逐年下降,必须提高加热炉运行效率,降低加热炉燃气损耗。通过调查我站3台在用原油加热炉的运行状况,分析影响加热炉运行效率的主要因素:加热炉结构和加热炉运行参数。针对影响加热炉运行效率的主要因素,提出综合节能技术途径。从而减小加热炉的热损失,提高加热炉的燃烧效率,优化加热炉运行。一方面通过改善加热炉的结构,增强加热炉有效利用热的吸收率,提高燃气利心率和加热炉的运行效率;另一方面,通过改善加热炉燃烧条件,加装过剩空气系数指示调节器。此外,加热炉在运行的过程中有大量的余热随烟气排放到空气中,既浪赀能源又污染空气,利用余热回收装置,可改善加热炉的燃烧条件,降低加热炉排烟温度,提高加热炉系统运行效率。 相似文献
9.
10.
11.
S. Sung 《Journal of the American Oil Chemists' Society》1981,58(5):A461-A463
A general discussion and case illustration are provided to illustrate considerations required to answer questions about a
new product, such as how to name it, package it, test it in the real world, present it to the trade, advertise it, promote
it and how to counter competitor's actions. 相似文献
12.
P. Soler-Rovira J. Soler-Soler J. Soler-Rovira A. Polo 《Nutrient Cycling in Agroecosystems》1995,43(1-3):173-177
Sewage sludge is waste for which the most positive outlet must be sought whilst, at the same time, making use of its qualities. In view of its organic matter and other nutrients content, it may be thought that the best system is to use it for agricultural purposes, although the load of heavy metals it may bear with it proves to be the main obstacle involved. Since it is a heterogeneous material whose composition depends on various factors, the content of such metals in sewage sludge will be highly variable. Thus it becomes necessary to always analyze sewage sludge before directing it towards agricultural use and also to know the heavy metal content of the soil where it is applied already so as to adjust this agronomical practice to the limits as set by current legislation in force. The provisions of law must also be complied with when certain substances deemed toxic or dangerous are present in sewage sludge. The purpose of all this is to prevent possible soil pollution and other kinds of risk involved in accumulation in the food chain. 相似文献
13.
14.
15.
16.
林刚 《高科技纤维与应用》2014,(2):1-4
简介了建立"复合材料共享数据库"国际大趋势。阐述分析了我国"复合材料共享数据库"创建的外围环境和内在动力。指出可借鉴国外经验和方法构建组织机构,并在确立创建思路和实施建议的基础上,提出了"战略规划更广、材料形态到更全、数据功能更强和商业化盈利模式"的创新设想。 相似文献
17.
18.
Z. Duvnjak G. Turcott Z. D. Duan 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1991,52(4):527-537
The production and consumption of sorbitol by Saccharomyces cerevisiae ATCC 36859 have been studied in this work. The results showed that the strain produced ethanol and sorbitol in a fructose medium, but it generated only ethanol while growing in a glucose medium. When the strain was pregrown on fructose and transferred to a sorbitol medium, it consumed that polyol and produced ethanol and fructose. It did not grow on sorbitol when it was transferred from a glucose medium. During the growth of the strain in a glucose-fructose medium, the sorbitol production started some time after the consumption of glucose. Both glucose and ethanol affected the production of sorbitol. Comparing the strain with a wild S. cerevisiae, it was found that the latter one did not produce sorbitol when it grew either on glucose or fructose. Furthermore, the wild strain grew well on sorbitol, regardless of whether it was pregrown on glucose or fructose but it did not produce fructose. 相似文献
19.
本文介绍了TTT(time-temperature-transformation)分析的工作原理和应用方法,主要介绍了它在陶瓷烧成工艺控制中的作用,以红砖烧成中TTT分析的结果为例用图表的形式加以说明,实践证明,这是一种有效的质量跟踪和控制手段,对指导工厂生产、稳定和提高烧成质量起到积极的作用,它和差热(DTA),热重(TG),热膨胀分析相比,更适合在工厂中应用,作为一种动态、在线的质量控制手段有着广泛的应用前景。 相似文献
20.
论述了高职高分子材料加工技术专业人才培养目标,设计了该专业的人才培养方案,制定该专业教学课程实施进程表,最后论述了实施该人才培养方案的运行保障条件。 相似文献