浅析高炉冲渣水余热利用

正1前言高炉冲渣池是冶炼过程中最末端工艺,高炉炼铁后产生的大量高温炉渣通过冲渣水进行冷却,在这个过程中能够产生大量温度在70~85℃的热水。高炉冲渣水低温余热具有热源温度较低、流量大的特点,将其回收利用既能节约能源,又能保护环境。2高炉冲渣水余热利用方式目前,国内对冲渣水余热的回收方式主要有两种:一是利用冲渣水采暖或洗浴用水;二是冲渣水余热发电。利用冲渣水采暖或洗浴用水,已广泛被一些北方的钢厂采用,并带来一定的经济效益。而冲渣水余热发电技术目前还处于研究实验阶段。     

高炉冲渣水余热利用探讨

高炉冲渣水余热利用对钢铁企业节能减排具有重要意义.对高炉冲渣水余热资源的特点进行了介绍,对高炉冲渣水余热利用的主要方式进行了阐述,对常用的冲渣水换热设备的选择进行了分析,并通过冲渣水余热采暖应用论证了其经济效益.     

利用相变材料回收高炉冲渣水余热的经济性分析

根据高炉冲渣水余热的特点,对利用相变材料回收高炉冲渣水余热的经济性进行了分析。     

Economic Analysis of Using Phase Change Material Recovery Waste Heat from Waste Water of Blast Furnace Slag

根据高炉冲渣水余热的特点,对利用相变材料回收高炉冲渣水余热的经济性进行了分析.     

高炉冲渣水余热在企业职工洗浴用水的应用

利用高炉冲渣水余热,经过滤处理后做为一次热媒,自来水做为二次热媒,通过板式换热器进行换热,一次水降温后回到原有冲渣水系统,二次水加热后可用于职工洗浴用水.这样不仅节约了能源消耗,降低成本,而且高炉冲渣水余热也得到合理利用.     

宣钢利用高炉冲渣水余热采暖的实践

简要介绍宣钢利用高炉冲渣水余热采暖的发展过程。宣钢首先直接用高炉冲渣水作为热介质进行采暖,在Ⅱ期工程进行了扩能改造,为解决管道堵塞问题,又利用换热器进行换热,以清水作为热介质进行采暖,并对系统逐步优化,最终满足采暖要求。余热资源得到利用,冲渣水得到降温,降低了生产成本和采暖成本,为钢铁企业的余热利用提供宝贵经验。     

高炉冲渣水余热供暖工程实例

高炉炼铁产生60～95℃冲渣水,蕴含了巨大热量。如果估算我国北方地区全年铁产量为3.5亿t,其高炉冲渣水余热全部回收用于供暖,则每年回收热量相当于节约标准煤400～600万t,不仅节能空间巨大,而且对于减少环境污染同样意义巨大。然而,由于冲渣水含有大量固体颗粒、悬浮物并具有腐蚀性,直接供暖或间接换热供暖会在管道、暖气片或换热器发生淤积、堵塞和腐蚀,因此长期以来冲渣水余热没有被全面、有效地回收利用。     

高炉冲渣水作为采暖热媒的应用及推广

介绍了高炉冲渣水作为采暖热媒的应用 ,比较了高炉冲渣水余热采暖与蒸汽采暖的经济效益。     

高炉冲渣水专用换热器的应用

针对高炉冲渣水悬浮物高、污物量大的特点,通过各种形式换热器在冲渣水换热实际应用中的比较,设计了一种高炉冲渣水专用换热器。该换热器具有压降小、传热效率高、不易结垢的特点,尤其在换热介质恶劣的工况下不易污堵且维护方便。实践应用证明,该换热器可充分回收高炉冲渣水中的余热,节能减排效果显著,具有很高的推广与应用价值。     

宝钢高炉冲渣水余热利用合同能源管理项目风险及效益计算

对宝钢高炉冲渣水余热利用合同能源管理项目进引资金风险评估和效益计算,确立项目可行性,为项目的实施提供必要的依据。     

小型锅炉烟尘测试时锅炉出力的计算

锅炉烟尘测试时,必须对锅炉出力进行测试。但监测中,许多小型锅炉往往不具备相关的计量装置和仪表,为解决这一问题,文章提出了用烟气量和空气过剩系数来计算锅炉的出力的公式,在实际使用中,该方法简单易行,其结果和实测值具有很好的一致怀。     

Unerroric of control of mutual compliance of the efficiency of hydrogen engines of unmanned vehicles in the conditions of mass production

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.     

中国煤炭地下气化技术的发展

本文综述了煤炭地下汽化技术的国内外发展现状,对我国“长通道、大断面”煤炭地下气化新工艺给予了技术经济评述,并提出了发展煤炭地下汽化技术的政策建议。     

Review of theory of distortion and disintegration of liquid streams

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.     

MgO膨胀剂细度对MgO水化和水泥浆体膨胀的影响

基于《水工混凝土掺用氧化镁技术规范》中的Ⅰ型氧化镁（MgO）,研究了该型MgO膨胀剂（MEA）细度对掺粉煤灰水泥浆体膨胀性能的影响。即采用X射线衍射分析(XRD)及同步热分析（TG DSC）分析了掺MEA水泥浆体中MgO的水化性。结果表明,养护温度相同时,MEA的细度对水泥浆体内MEA中MgO的水化和水泥浆体的膨胀无显著影响,产生的膨胀均能补偿水泥浆体的收缩;MEA的细度可从试验设计采用的45 μm筛筛余15%左右增加到30%左右,这将有利于MEA生产企业的节能降耗。     

机车车轮多轴疲劳强度安全评定的研究

使用ANSYS8.0软件对高速列车车轮进行了三维有限元分析,计算出车轮在直线、曲线和道岔条件下牵引、制动共6种工况时孔边薄弱部位的应力,分别通过Mises等效平均应力方法、Sines平均主应力方法和应力分量中考虑平均应力方法计算出应力在极值位置时的等效应力幅、等效平均应力,从而进一步算出车轮的安全系数,对其疲劳强度进行评定,并对3种方法进行了比较研究。     

Constructal optimization of the geometry of an array of micro-channels

This paper documents the geometric optimization of an array of circular and non-circular ducts. The optimization was carried out numerically using finite volume method. As optimal dimensions were independent of the array configuration, the numerical simulation was performed on a unit cell. Numerical optimization for circular, square and isosceles right triangle cross-sections of channels was performed. Based on the results of this investigation, some correlations were proposed to predict the optimal hydraulic diameter and dimensionless heat transfer per unit volume. In addition to examining the effect of pressure drop on these parameters, it was showed that among the different geometries of this study, square cross-section has the most efficiency for a given volume. The numerical results of the present study were compared with approximate results reported in the literature which a good agreement was observed.     

固体热辐射Yong性能分析

本文对漫灰均温物体在常物性条件下对外辐射传热的Ｙｏｎｇ值计算建立了数学模型。通过与物体内能Ｙｏｎｇ公式的数值计算比较,得出了辐射能量的Ｙｏｎｇ值不大于内能Ｙｏｎｇ值的结论。从初步的热射Ｙｏｎｇ值计算公式发现。Ｙｏｎｇ与物体表面辐射率有关。     

Measurements of concentration distribution of hydrogen jet using deflection of center of the laser spot

The main purpose of this work is to propose a new method to evaluate the concentration distribution of the hydrogen jet by using a He–Ne laser through the jet. This research attempts to apply the expression of concentration Gaussian distribution, the refraction formula of inhomogeneous refractive index medium, and the concentration inversion function to disclose the displacement of the center of the laser spot at different heights in the gas jet. The spot images of the laser beam passing through the gas jet at three vertical heights z = 10d, 20d, 30d, and different radial positions are obtained. The radial spatial asymmetry of the gas jet is also found in the experiment. Finally, the calculated concentration distribution curve and the fluent simulation curve, it is found that the two results are very similar. Our findings show that the error between the concentration distribution of this method and the simulated concentration distribution reaches 2.43%.     

Heat of vaporization of mixtures

General expressions for the heat of vaporization of mixtures at constant pressure; at constant temperature; and at constant pressure, temperature, and composition are proposed. The last one is related to the liquid-vapor interface where steady vaporization or condensation is taking place. Numerical examples by the proposed expressions are shown for binary mixtures of HCFC22(R22) and (HCFC123(R123) © 1997 Scripta Technica, Inc. Heat Trans Jpn Res, 25(1): 12–24, 1996