热载体加热炉的节能增产改造技术

传统的热载体加热炉存在热效率和产量低等问题 ,详细介绍了一种针对热载体加热炉的节能改造技术 ,实践表明 :该技术能够有效地提高热载体加热炉的热效率和热利用率 ,从而提高加热炉的产量 ,以达到节能与增产的目的     

热载体加热技术的应用

介绍了导热油为介质的热载体加热炉的技术和应用范围,并分析和阐述了使用各种燃料的加热炉的优缺点以及配套设备的合理选用,对广大用户了解热载体加热炉的发展和使用具有指导意义。     

炭素成型热媒炉热效率分析及提高

本文主要介绍了有机热载体加热炉系统在炭素厂阳极成型生产当中的应用,分析了热煤系统的结构特点、热工特点。同时重点对该系统的热效率进行了分析,提出了提高热煤锅炉热效率的措施。     

影响有机热载体炉安全性的因素分析

通过对影响有机热载体炉安全性的诸多因素分析,提出了有机热载体炉的安全控制措施.并通过一起事故案例说明遵守<有机热载体炉安全技术监察规程>的重要性和必要性.     

高温有机热载体HD360的开发和生产

目前超过360℃的有机热载体国内企业尚无生产,国外进口价格每吨12万~15万元左右,过高的价格限制了使用高温有机热载体行业的发展。山东恒导石油化工股份有限公司与中石化石油化工科学研究院共同开发研制的360℃高温液相有机热载体可替代进口产品,填补了国内空白,由于该产品独特的化学结构在高温条件下极为稳定,生产工艺独特,确保了产品能在高温液态条件下长时间使用,为国内使用高温有机热载体的企业带来了福音。     

本钢1700热连轧厂加热炉改造自动化仪表设计特点

介绍本溪钢铁(集团)有限责任公司1700热连轧厂加热炉改造工程的设备设计、施工设计的特点,对重油燃烧段仪表的配置、热电偶的安装、管道内有保温层的平孔板的安装及取压、气动执行机构的选型、阀门选型及安装、变送器的安装、控制室到加热炉现场电缆路由的设计、控制室的设计、DCS的设计、软件系统升级等主要技术问题进行了阐述,这些旧厂加热炉改造的设计经验对其它旧厂加热炉改造工程及新建加热炉工程均有借鉴之处.     

步进梁式加热炉设备安装技术

本文对步进梁式加热炉设备部分组成、安装技术要求作了系统阐述,提出了行之有效的安装技术方法。     

步进式加热炉水封槽刮渣板、裙罩优化改进

针对四川德胜集团钒钛有限公司轧钢厂步进式加热炉,在生产过程中存在水封槽刮渣板易脱落、裙罩变形烧损严重等问题,对裙罩结构、刮渣板安装方式进行了重新设计和安装,改进后的加热炉水封槽运行稳定,刮渣板、裙罩的使用寿命由2个月增加到12个月,提升了步进加热炉的作业效率,取得了良好的经济效益,可以为同类型加热炉的改进提供借鉴。     

大型步进式加热炉设备、管道快速安装技术

在冶金工业不断发展的过程中,钢板的厚度和宽度轧制技术有了一定的发展,增加了钢坯尺寸。步进式加热炉不会受到板坯尺寸的限制,并且生产能力大。基于此,针对目前设备安装行业中存在的问题,提出了相应的快速安装技术和流程。以大型步进式加热炉为例,对大型步进式加热炉的安装工序、特点进行分析,根据实际情况分析工序交叉交接中的操作要点和注意事项,总结一套行之有效的技术方法,对成本控制、安装进度、人力组织等方面具有实际的指导性和操作性。     

步进式方坯加热炉跑偏原因及调整方法

2020年1月,华菱涟钢对棒二线加热炉进行大修,步进式加热炉方坯跑偏是本次加热炉大修的关键质量控制点,本文分析加热炉大修前的现状以及上一次水梁更换存在的问题,探究了方坯跑偏的原因,总结出水梁立柱的安装精度关键质量控制点和调整方法。     

Acoustic field interaction with a boiling system under terrestrial gravity and microgravity

Pool boiling experiments from a platinum wire heater in FC-72 liquid were conducted under terrestrial and microgravity conditions, both with and without the presence of a high-intensity acoustic standing wave within the fluid. The purpose of this research was to study the interaction between an acoustic field and a pool boiling system in normal gravity and microgravity. The absence of buoyancy in microgravity complicates the process of boiling. The acoustic force on a vapor bubble generated from a heated wire in a standing wave was shown to be able to play the role of buoyancy in microgravity. The microgravity environment was achieved with 0.6 and 2.1-s drop towers. The sound was transmitted through the fluid medium by means of a half wavelength sonic transducer driven at 10.18 kHz. At high enough acoustic pressure amplitudes cavitation and streaming began playing an important role in vapor bubble dynamics and heat transfer. Several different fixed heat fluxes were chosen for the microgravity experiment and the effects of acoustics on the surface temperature of the heater were recorded and the vapor bubble movement was filmed. Video images of the pool boiling processes and heat transfer data are presented.     

4．2MW燃煤热风炉结构设计特点分析

分析了热风炉设计中的工作可靠性、强化传热、膨胀补式热风炉的设计方案、结构和系统布置,通过采用链条炉排、绝热炉膛、管式换热器、螺纹烟管、烟气再循环、碳钢耐热处理等技术措施,确保了热风炉的使用寿命和运行经济性.     

Efficiency of carbon utilization in blast-furnace heat consumption

Blast heating in the blast furnace saves as much heat as it supplies. However, to obtain such heat in a blast furnace, more fuel must be burned than in any air heater. The efficiency of a blast furnace as a heater is less than for any air heater and is no more than 12%, in some cases.     

高效节能型钢包烘烤器的研究和设计

概述了钢包烘烤的意义，国内外烘包器的现状，重点介绍了新开发的自身预热钢包烘烤器和高效蓄热钢包烘烤器，对高炉煤气用于钢包烘烤进行了分析；以马钢烘包器改造为例进行了简要的技术经济分析。     

直流电弧炉钢棒式底电极热状态数值模拟

 采用Fluent软件和文献建立的二维传热模型,对底电极稳态和非稳态的传热过程进行了数值模拟。计算中考虑了底电极物性随温度的变化、空气隙的等效对流换热系数、底电极内部电磁力和焦耳热的影响等,并采用UDF函数加以实现。通过数值模拟,研究不同底电极结构、电流强度以及绝热/绝缘材料熔损对底电极热状态的影响。计算得到的冷却水进出口温差随冶炼时间的变化与现场实测结果吻合,进一步验证了所建模型和参数选择的合理性。计算结果表明,底电极周围绝热/绝缘材料熔损和电磁力对底电极的热状态和熔化深度起着重要的作用。     

Heat transfer performance of porous titanium

Porous titanium fibre materials with different structural parameters were prepared by vacuum sintering method. The thickness,porosity and wire diameter of prepared materials were investigated to understand the effects of structural parameters on pool heat transmission performance of titanium fibre porous material. As a result,better heat transfer performance is obtained when overheating is less than 10 °C. In addition,when the wire diameter is smaller,the heat transfer is better. However,when superheating is above 10 °C,heat transfer performance can be improved by increasing the wire diameter. Moreover,thickness influences the superficial area of the prepared material and affects the thermal resistance when bubbles move inside the material; superficial area and thermal resistance are the two key factors that jointly impact the heat transfer in relation to the thickness of the materials. Experimental results also show that the materials of 3 mm in thickness exhibit the best performance for heat transmission. Furthermore,changes in porosity affect the nucleation site density and the resistance to bubble detachment; however,the nucleation site density and the resistance to bubble detachment conflict with each other. In summary,the titanium fibre porous material with a 50% porosity exhibits suitable heat transfer performance.     

锅炉烟气侧传热强化器的开发及应用

针对目前锅炉内烟气侧换热效率低的问题，基于气体传热原理的分析，开发了一类气侧传热强化器。其采用高导热非金属材料为主体材质达到增强导热及辐射的目的；通过采用蜂窝体形式达到增大比表面积，从而增强对流换热的目的。将此应用于大庆油田的火管式锅炉，取得了显著的节能效果。最后，以火管式锅炉的传热强化器结构为基础，针对各种结构的换热方式，给出了一类通用的气体传热强化器的结构及安装形式。     

国内外烘包器的现状及剖析

本文叙述了国内外钢包烘包器的现状，分析了新型烘包器的高效节能机理，指出了新型烘包器的技术特点     

Experimental Determination of Heat Transfer Within the Metal/Mold Gap in a DC Casting Mold: Part II. Effect of Casting Metal, Mold Material, and Other Casting Parameters

Extensive experimental studies were conducted to quantify the effect of different parameters that can affect the heat transfer from the metal to the mold during the steady-state phase of DC casting. In the first part previously published, the experimental technique was established and results were reported for the effect of gas type (atmosphere within the mold) and the gap between the metal and the mold. The results showed the significant effect of gas thermal conductivity and the metal-mold gap on the mold wall heat transfer coefficient. In this second publication on heat transfer in the mold wall region of a DC casting mold, the results from the effect of casting temperature, gas flow rate, casting alloy, mold material, and the mold insert material on the mold wall heat transfer coefficient are described. The experiments reported in the current paper show that these additional factors tested do not affect the heat flux through the mold wall to the same extent as the gap size or the gas type. The heat transfer coefficient changes by less than 5 pct when casting temperature is changed by ±25 K, less than 15 pct when the gas flow rate within the metal-mold gap flows at up to 3 LPM, and approximately 30 pct when the mold material is changed from stainless steel to AA601 to copper. Similar results were obtained when different insert materials were used. These results are explained with the help of an electrical analogy of heat transfer and are consistent with the heat transfer theory.     

大型轧辊堆焊、热处理一体化加热炉的设计及应用

设计一种新型一体化加热炉 ,用于大型轧辊预热、堆焊、热处理。该炉主要由滚轮架、炉体、炉顶工作平台组成 ,结构紧凑 ,性能优越 ,实用性强 ,非常适合小企业发展大型轧辊堆焊产业。