共查询到20条相似文献,搜索用时 265 毫秒
1.
连铸坯热装炉改善钢的组织性能鞠幼华鞍钢钢研所我国连铸工业的发展与国际发达国家有许多不同之处,随着连铸坯短流程直送热装工艺的推广应用与连铸连轧新工艺的开发,将形成连铸坯冷装、温装、热装、在线补热直接轧制和薄板坯连铸连轧等多种工艺。装炉坯温(表面形心温度... 相似文献
2.
3.
4.
5.
中厚板坯热装直送工艺可大幅度降低加热炉能耗,降低钢材生产成本。南钢超宽板坯因宽厚比大,极易产生纵向裂纹,南钢板材铸机表面纵向裂纹发生率高,且超宽板坯因铸坯平整度差去毛刺困难,且在热装直送过程中因两相区温度区间入炉,导致钢板表面产生了热装裂纹,因此宽板坯纵向裂纹、去毛刺和热装裂纹问题成为南钢板材铸机实现流程优化、铸坯热装直送和节能降耗的关键问题。详细描述了南钢超宽板坯铸机热装直送工艺实践过程,优化铸机去毛刺工艺,并对产生的板坯纵向裂纹和钢板表面热装裂纹产生原因进行分析,优化影响板坯表面纵向裂纹连铸生产工艺制度,同时根据钢种成分特点,调整优化不同钢种成分钢种坯料堆冷时间和控制入炉温度,避开热装裂纹敏感温度区,避免了热装裂纹,实现了超宽板坯热装直送工艺,降低了轧钢加热炉生产能耗。 相似文献
6.
<正>随着连铸、铸坯无缺陷技术的突破,以及热连轧工艺装备的发展,通过充分利用连铸坯白身温度,采用“热送热装”轧制技术,已成为钢铁生产节能降耗的发展方向。采用热送直轧工艺能简化生产工艺流程,缩短物流周期,提高加热炉和轧机的生产能力,减少烧损,大幅度节省能耗,提高成材率和生产效率,降低劳动强度。广西钢铁集团双流板坯连铸机于2020年投产,由于投产初期设备精度欠佳、工艺尚不成熟,加之生产组织及管理制度不完善等,导致铸坯热送率较低。集团通过不断提高设备精度、优化生产工艺,保证铸坯质量及优化生产组织,大幅提高了铸坯热送率、降低了加热炉煤气消耗,实现了节约能源低碳生产,取得了显著的经济效益。 相似文献
7.
8.
9.
10.
介绍了近几年南钢热送热装工作开展情况和做好热装生产的经验,并对制约热装生产的不利因素和未来热装效益增长潜力进行了初步分析.统计分析数据表明热装生产的节能降耗效果十分显著. 相似文献
11.
《International Journal of Hydrogen Energy》2022,47(63):26789-26797
The issues related to the reliability of hydrogen engines of unmanned vehicles and increasing the efficiency of using hydrogen as fuel when using the method of its production during the decomposition of hydrogen-containing molecules of liquid-phase organic compounds in a plasma discharge under the action of intense ultrasonic exposure are considered. Experiments have shown that as a result of decomposition in the acoustoplasma discharge of liquid hydrocarbons, solid-phase carbon-containing products are formed, chemical transformations occur in the liquid phase and hydrogen-containing combustible gas is formed. Hydrogen-containing gas can be used as fuel immediately after synthesis, i.e. it does not require separation, since in addition to hydrogen it contains only impurities of CO2 and water vapor. The purpose of the study is to formalize the basic conditions for tightening the control of mutual compliance with the efficiency of hydrogen engines of the same series in the conditions of their mass production. Methods of mathematical statistics and hardware-software modeling were used in the study. The term “unerroric of quality mutual compliance control” is introduced to describe a set of hardware and software tools for such control. The principle of in-depth testing of the technical condition of such engines of one series is described in a multidimensional formulation of the quality control problem for three of their operating parameters at once. The conditions for increasing the mutual correspondence of the measured values of such parameters in the conditions of serial production of hydrogen engines are formalized. 相似文献
12.
城镇生活污水处理装置是由农村户用沼气地发展演变而来,是一种小型、分散化处理污水的装置 ,是环境建设的需要。文章着重从我国环保政策及目标、生活污水造成的污染状况、急需整治的公共设施、生活污水净化装置的演变以及社会经济效益和环境效益等方面,阐述了其产业化的重要性。 相似文献
13.
柴油加氢精制是加工劣质原料和生产清洁柴油的重要途径,但由于加氢过程涉及高温、高压、临氢,反应产物组成复杂,柴油加氢装置分馏系统能耗较高。Aspen Plus是对生产装置进行稳态模拟的大型通用流程模拟系统,可为装置优化操作、节能降耗、寻找生产瓶颈提供指导。应用Aspen Plus流程模拟软件,建立了某120×104t/a柴油加氢精制装置的分馏系统流程模拟,研究了汽提塔的进料温度、汽提蒸汽量对汽提塔底物流H2S及H2O含量、分馏塔重沸炉的影响,同时分析了提高分馏塔进料温度对塔的气-液相负荷、汽柴油产量和重沸炉负荷产生的影响。通过对以上研究结果的综合分析发现,提高汽提塔进料温度可以强化塔的汽提效果,降低汽提蒸汽用量和分馏塔重沸炉热负荷;提高分馏塔进料温度,可使塔内气-液相负荷分布更加平均,操作稳定性增加,汽油产量增加、柴油产量减小,提高装置的经济效益,显著降低重沸炉负荷。当分馏塔进料温度提升15℃时,可节省燃料气209kg/h。 相似文献
14.
15.
应用瞬态谱分析方法对燃烧流化床声波信号进行了频谱分析,发现气泡能量分布呈Gamma分布形式,在Argyrious和Yoshida等人提出的模型的基础上,发展了燃烧流化床气泡能量分布模型,并通过优化迭代对模型参数进行求解,在实验和理论的基础上得出了更加切合实际的燃烧流化床气泡能量分布模型 相似文献
16.
High-energy ball milling has been shown to decrease the release temperature, increase the reaction kinetics, and lower the enthalpy of formation of metal hydrides in certain cases. This paper discusses several potential mechanisms for the reduction of the enthalpy of formation. Although the increased surface and grain boundary energy could play a role in reducing the enthalpy of formation, the predicted magnitude is too small to account for experimental observations. Structural deformation and the associated volume change provide another mechanism for the change in this thermodynamic property. We employed three equations of state models to characterize the excess energy present in the deformed regions and found that the excess volume provides a plausible explanation for the experimentally observed change in thermodynamic properties. 相似文献
17.
18.
19.
Linear and nonlinear analyses of the instabilities and distortion of liquid streams injected into a gaseous media are discussed. The various fundamental mechanisms and the predictive capabilities for the distortions are emphasized. Round jets, planar sheets, annular sheets, and conical sheets are discussed in detail. The balance between capillary and inertial forces is primarily examined. The method for simplifying the analyses in the case of thin liquid sheets is discussed. The capabilities for representing the droplet size distribution that follows the stream disintegration are outlined. 相似文献
20.
分析蒙江流域降水及径流的变化特征,有利于水资源的开发利用与保护。基于蒙江流域1959~2012年降水、径流资料,应用线性倾向估计法探讨了降水和径流年际、年代变化特征;借助Mann-Kendall法、Yamamoto法、滑动t检验、小波分析法和R/S方法探讨了降水、径流的趋势性、突变性、周期性及长程相关性。结果表明,降水年际、年代间变化较小,径流年际间波动剧烈;年代间,最大年径流量出现时间一般较降水滞后3年,除1990年代,最小年径流、年降水出现时间同步,降水、径流分别呈不显著减少、不显著增加变化,这主要是由1990年以后的人类活动所致;流域降水在1975、1981年发生突变,年径流在1991年发生突变,均存在24年的主周期,未来一段时期内,降水、径流均呈偏丰状态,区域水资源形势较为乐观。研究成果可为区域水电站运行及水资源配置提供参考。 相似文献