第三代篦冷机整体更换为第四代中置辊破冷却机的实践

介绍5?000 t/d水泥生产线将处理能力不足、冷却效果差的第三代篦冷机整体拆除,更换为第四代中置辊破冷却机的实践。改造后熟料产量由6?500 t/d提高至6?967 t/d,出篦冷机熟料温度由145 ℃降至91 ℃,熟料标准煤耗由105.4 kg/t降至102.4 kg/t,生产线烧成系统指标明显改善,熟料产量与强度均有提高。     

4 000 t/d熟料生产线节煤及解决黄心料问题的措施

针对4?000 t/d熟料生产线煤耗高、产量低及持续几年无法解决的黄心料问题,针对性地优化改造入窑生料计量设备,窑头选用新型节煤燃烧器,优化篦冷机操作,提高篦冷机冷却效率,合理优化分解炉系统操作参数。调整后熟料标准煤耗同比下降4.85 kg/t,黄心料现象消失,熟料产量提高3%,熟料28 d抗压强度提高了3.1 MPa。     

TCFC5500篦冷机的优化改造

5 000 t/d熟料生产线产量由5 700 t/d提升至6200 t/d后,篦冷机的冷却效果变差,出篦冷机熟料温度达到150 ℃以上,严重影响熟料质量和后续生产工序,通过对固定篦床角度、篦板结构及一、二室供风的改造,出篦冷机熟料温度下降到110℃以下,熟料煤耗也下降,达到了较好的效果.     

5 000 t/d熟料生产线节煤措施

针对5 000 t/d熟料生产线存在的问题，针对性地采取了节煤措施，包括：减少熟料灰对煤粉的污染；窑头选用新型煤粉燃烧器；优化改造入窑生料计量设备；优化改造预热器系统保温；优化篦冷机篦板，提高篦冷机冷却效率；减少窑系统漏风。通过几年的持续改造，该生产线2017年熟料标准煤耗达到99.19 kg/t，较2012年下降了9.82 kg/t。     

硫铝酸盐水泥熟料烧成系统的技术改造

改造前,喂料系统对流动性好的生料无法实现稳定控制,喂料量波动大,频发冲料;二三次风温低,出冷却机熟料温度高.转子秤和第四代步进式稳流篦冷机对喂料系统和熟料冷却系统进行改造.改造后,窑系统运转平稳,硫铝酸盐水泥熟料产量提高至600 t/d以上,熟料标准煤耗降低20 kg/t熟料,熟料工序电耗降低3 kWh/t.     

一起煤耗高的原因分析及解决措施

某5 000 t/d生产线配置Φ4.8 m×72 m回转窑,预分解系统为五级预热器带TDF分解炉,配置第四代篦冷机,冷却面积为117 m2。该公司自建厂以来熟料产质量一直比较稳定,但单位熟料标准煤耗一直徘徊在112~115 kg/t,超过了5 000 t/d生产线的正常水平,较同类系统高6~9 kg/t。     

浅谈篦冷机用风优化及篦板改造

对两条5?000 t/d生产线的篦冷机进行用风优化及篦板改造,用较低的成本取得了较好的效果。改造后,二次风温更加稳定,由1?000~1?050 ℃提升至1?120~1?170 ℃,熟料平均实物煤耗由140.4 kg/t降至136.54 kg/t,出篦冷机熟料温度由215 ℃下降至90 ℃以下。     

优化改造篦冷机 提高水泥窑余热发电量

<正>0引言滕州中联水泥有限公司4 600 t/d新型水泥熟料干法生产线，配套建设9 MW纯低温余热发电系统。自投产以来，熟料标煤耗平均为107kg/t。余热发电台时平均为8300k Wh。2021年为降低熟料能耗，通过对篦冷机固定篦床进行改造，大幅提升了篦冷机急冷效果，二次风温平均提升约100℃，熟料煤电消耗指标明显降低，但篦冷机前端热回收效率提升后，     

NC42356型篦冷机的改造方法与效果分析

5 000 t/d篦冷机风量与风压偏离正常的工况点,出篦冷机熟料温度高,急冷效果差,二次风温偏低,熟料层经常板结,甚至堆"雪人"。应用圣达瀚篦冷机技术改造后,窑系统工艺状况改善,运行指标向好,熟料台时提高9.89%,熟料实物煤耗降低5.93%,热耗降低8.63%,熟料28 d抗压强度提高2.2 MPa。     

我公司四代篦冷机换热效率提升改造

山东东华水泥有限公司目前有两条5 000 t/d熟料生产线,二线采用FL-Smith推动棒式篦冷机,为了降低熟料成本,熟料产量提高到6 300 t/d以上,原有篦冷机不能满足生产要求,出现篦床料层偏厚、篦床推动棒磨损大、熟料热交换率低、出篦冷机熟料温度过高等问题,既影响了篦冷机的使用寿命,又增加了煤耗。因此,我公司对二线篦冷机部分高压风机、流量调节阀等进行了改造,效果明显。     

乙烯酮(双乙烯酮)下游产品废水的治理技术

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。     

Semi-empirical equation of state of metals. Equation of state of aluminum

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.     

水泥水化热测定方法综述

水泥水化热是中、低热水泥和核电工程用水泥的一项关键的技术指标。全球范围内测定水泥水化热的方法有溶解法、直接法/半绝热法、等温传导量热法三种。本文总结了中、美、欧相关方法标准,对其测试原理、仪器设备、试验过程等方面进行了比对,并对其在领域的应用做了简单的概括。     

几种乙炔加压设备性能的比较

阐述并比较了几种加压设备在乙炔加压清净过程中的性能和特点。     

三种煤样燃烧热的测定

本文通过三个厂家提供的三种煤样燃烧热的测定,由测定结果综合得出3号煤样燃烧最完全、燃烧热也最大,是三个煤样中最好的一种。     

Calorimetric and Computational Study of Enthalpy of Formation of Diperoxide of Cyclohexanone

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.     

气化给煤系统故障分析

气化给煤装置自投运以来,出现了气化煤仓堵煤、称重给煤机输送皮带因跑偏而损伤以及清扫装置故障频繁等问题,多次造成气化系统减负荷运行。通过对出现的各种问题进行分析,找到了产生这些问题的原因,并有针对性地采用配煤和改进清扫链等措施,使出现的问题得到了极大的改善。     

小议汽车涂装工艺设计对涂装成本的影响

论述了涂装工艺设计对涂装设备投资、涂装生产成本的影响。     

Measurement of the gradient of viscosity with composition of mixtures of non-ideal gases

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%.     

塔设备改造选型的分析

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）。