共查询到20条相似文献,搜索用时 109 毫秒
1.
针对工业生产中常见的流化床锅炉进行了综合控制方案的设计与实施。选用西门子DCSPCS7进行基础过程控制系统实施,应用燃烧优化软件,完成优化控制方案实施。综合控制方案实施的结果表明:该方案能够保证流化床锅炉连续稳定运行,具备良好的节能效果。 相似文献
2.
3.
采用原油配比优化、加工流程优化和整体生产优化方案对某石亿公司炼油厂的原油进行了资源优化,分析了资源配置优化对产品质量和经济效益的影响,运行结果分析表明资源优化配置方案实施后经济效益显著,合理优化资源能取得较好的经济效益。 相似文献
4.
结合东胜联合站现有的技术特点,设计了一套自动化改造及优化方案,方案数据采集及监控采用DCS系统,并用PLC实施现场控制。同时,对油田原油生产运行参数进行了优化研究,在优化的基础上进行了系统的自动化改进,使系统效率进一步得到提高。通过优化改造,联合站运行能耗节省了25%,达到了预期的设计目标。 相似文献
5.
介绍新建 3# 粉煤灰库项目的实施过程 ,论述该灰库初设方案的优化 ,结合原灰库运行中存在的问题对新建灰库进行改进 ,实现了方案优化 ,节省了投资费用 ,投用后效益良好。 相似文献
6.
7.
8.
9.
《化工自动化及仪表》2015,(8)
对某石化厂实施的低氮燃烧+选择性催化还原法脱硝(LNB+SCR)技术的脱硝效率进行分析,针对原控制方案存在的控制精度差及响应速度慢等缺点,提出优化方案:通过增设旁路调节阀提升氨气流量的控制精度;增加圆形管,解决了烟道NOx流量难测量的问题,为后续比值控制和串级控制的实施打下基础。优化后的控制方案投入使用后,装置运行良好,脱硝效率显著提高,解决了同类装置氨气用量范围控制难度大的问题。 相似文献
10.
由于余热发电以热定电,如果汽轮机发电机组配置前热量不准确就会造成水泥余热发电汽轮机存在运行工况与设计工况不匹配问题,导致汽轮机偏离设计工况处于变工况下运行,尤其是多窑一机汽轮发电机组,如果偏离设计工况,在单窑生产条件下汽轮机更会处于小容量工况下运行,机组严重偏离设计值处于小容量流量工况运行会导致汽轮机相对内效率低下。以冀东海德堡(泾阳)水泥有限公司汽轮机设计数据及运行数据为依据,对其效率进行分析确定其运行效率低于设计值,尤其在小容量工况效率劣化更加严重。分析了该汽轮机运行效率低于设计值的根本原因,并制定实施优化改进方案,对汽轮机机组内部通流进行优化。方案实施后经过数据对比分析,汽轮机相对内效率在单窑一机小容量工况下大幅提升,并在两窑一机工况下也有很大提升幅度,为水泥行业其他处于低效运行的汽轮机组提高效率开拓了思路,形成可参照实施的案例。 相似文献
11.
乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
13.
14.
D. G. Gordeev L. F. Gudarenko M. V. Zhernokletov V. G. Kudel’kin M. A. Mochalov 《Combustion, Explosion, and Shock Waves》2008,44(2):177-189
A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation
of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from
the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO2) of density 0.08 g/cm3.
__________
Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008. 相似文献
15.
16.
17.
Jorge Marcelo Romero Soledad Bustillo Hugo Enrique Ramirez Maisuls Nelly Lidia Jorge Manuel Eduardo Gómez Vara Eduardo Alberto Castro Alicia H. Jubert 《International journal of molecular sciences》2007,8(7):688-694
A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out. 相似文献
18.
A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%. 相似文献
19.
塔设备改造选型的分析 总被引:2,自引:0,他引:2
就当前扩产增容中塔设备设计和改造时板式塔和填料塔的选型问题加以分析。在评述目前国内常用的几种塔板和新型填料之后,着重介绍一种新型塔板(导向梯形浮阀塔板)和一种新型填料(波环填料——乾隆帕克)。 相似文献