石粉和脱硫石膏混合装置的设计与应用

利用双轴搅拌机的工作原理设计的石粉和脱硫石膏混合装置，将石粉和脱硫石膏混合成干湿均匀料加入水泥磨，既利用了石粉、节约了石子，又解决了水泥生产过程中脱硫石膏水分大、不便输送和难稳定入磨的问题，效果显著。     

脱硫石膏给料设备的改造

1脱硫石膏输送工艺及问题 我公司从2007年就开始使用脱硫石膏，输送工艺如图1所示。脱硫石膏由人工加入搅拌机，经恒速计量秤、斜坡皮带机到微机配料皮带机。     

脱硫石膏作水泥缓凝剂的应用研究

本文研究了脱硫石膏代替天然石膏作水泥缓凝剂时对水泥性能的影响,并在实际生产中进行了工业试验。研究表明,脱硫石膏代替天然石膏作水泥缓凝剂,水泥各项指标符合要求,可以代替天然石膏用于水泥生产。此外针对脱硫石膏粘性强极易粘附在设备上,造成积料、堵塞等情况,对脱硫石膏的输送和喂料问题提出了解决方案。     

水泥磨掺加脱硫石膏输送系统技术改造

由于生产所用天然石膏含土量大,设备黏料严重,为降低生产成本,根据现场实际情况,确定采用脱硫石膏代替天然石膏进行配料生产,本文介绍了利用皮带输送机作为掺加脱硫石膏输送系统的可行性研究,并对系统进行了相应的改造。改造后解决了进料系统黏料问题,消除了各环节作业中的安全隐患。     

电厂脱硫石膏制备水泥缓凝剂的研究

试验以脱硫石膏为主要原材料、改性脱硫石膏为胶结料,添加少量的生石灰和高钙粉煤灰,经压力成型制备水泥缓凝剂。通过工艺优化,确定了产品的最佳物料配比,并研究了其应用性能。结果表明：掺加4%改性脱硫石膏缓凝剂能正常调节水泥的凝结时间。项目的实施实现了脱硫石膏的深度资源化利用,降低了产品的生产成本,应用前景广阔。     

脱硫石膏料仓堵料的处理

脱硫石膏SO3含量通常在20％～40％,经试验证明,加入脱硫石膏的熟料,普通水泥在标准稠度需水量方面略有降低,凝结时间稍有延长。另外脱硫石膏的杂质非常少,而天然石膏通常有10％左右的含泥量,所以加脱硫石膏的水泥强度比加天然石膏的水泥略高,是目前大量在用的水泥缓凝剂——天然石膏的良好替代品。但脱硫石膏应用的最大难点在于其含水率在10％～20％,有的可能更高。由于其具有较高的黏性,流动性差,在料仓下料口、计量设备等多处都会发生严重的堵料现象,一般的装置无法完成脱硫石膏的顺利输送和准确计量。     

脱硫石膏计量控制系统设计与应用

使用脱硫石膏替代天然石膏作为水泥缓凝剂,是将废物资源化的有效途径,但脱硫石膏含水量高,大部分在10％～20％之间,有的甚至更高,流动性差,输送和准确计量是个难点,特别是料仓下料口、计量设备等处会发生严重堵料现象,无法准确配料.本文介绍了某联合水泥集团某分公司1号Φ3.8m×13m水泥磨(台时产量为20t/h)的脱硫石膏计量控制系统的优化设计方案.     

一种陶瓷行业脱硫塔废液的石膏回收装置

一种陶瓷行业脱硫塔废液的石膏回收装置,针对陶瓷行业脱硫废液的石膏回收利用率低、废水对环境污染严重等问题,专门设计了一种多级石膏沉淀箱,不同级别的沉淀箱处理经过分级过滤器作用后初始浓度不同的石膏水,增大处理量,经过多级振动沉淀,最终N级沉淀箱的高浓度石膏浆在输送装置的作用下输送堆放在石膏回收池内,回收处理更方便,该石膏回...     

基于高黏物料输送系统的技术优化

因水泥配料站所用脱硫石膏和炉渣等湿度高，设备黏结堵料严重，时常断料导致水泥成分波动较大，严重影响产品质量。为改善下料状况，提高设备运转稳定性，对整个水泥配料站输送系统进行技术改造，采用正反转带式输送机替代闸板式分料阀，实现中控远程控制进料，同时库内加装清库机、库底加装清堵机等，彻底解决了下料问题，提高了生产运行稳定性，降低了人员劳动强度和安全风险。     

水泥粉磨系统脱硫石膏库防堵改造

工业脱硫石膏水分大,用混凝土圆库储存容易堵料,石膏断料现象频繁,出磨水泥SO3含量波动大,影响水泥质量。为解决工业脱硫石膏配料中的断料问题,从节约成本方面考虑,在2台水泥磨入辊压机物料皮带旁各建一个脱硫石膏钢板仓,实现了脱硫石膏的稳定喂料和各品种水泥SO3指标的有效控制。     

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。     

A study of miscibility of blends of polybutadienes of varying microstructure

The miscibility of various amorphous polybutadienes with mixed microstructures of 1,4 addition units (cis, 1,4 and trans 1,4) and 1,2 addition units have been investigated. The studies here involved optical transparency, differential scanning calorimetry, and small angle light scattering. It was found that a 90 percent (cis) 1, 4 addition polybutadiene was immiscible with high (91 percent) 1,2 addition polybutadiene. Reduction of the 1,2 content to 71 percent induced an upper critical solution temperature (UCST) with the cis 1,4 polymer. Polybutadienes with 50 percent and 10 percent 1,2 contents were miscible above the crystalline melting temperature of the cis 1,4 polybutadiene. Immiscibility of the 91 percent 1,2 addition polymer was also found with a 10 percent 1,2 polybutadiene. The latter polymer also exhibits an UCST with the 71 percent 1,2 polymer. The results are used to interpret the characteristics of blends of polybutadienes of varying microstructure.     

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。     

粉煤灰中烧失量检测的不确定度分析

以F类粉煤灰为例,详细介绍了测定粉煤灰中烧失量的步骤、计算数学模型、影响测量不确定度的因素以及各项测量不确定度分量评定,人员、设备、材料、方法、环境都是影响测量不确定的因素。     

生物油的成分分析及物性测定

以添加FeCl2的ZnCl2-KCl混合熔盐裂解纤维素和秸秆,制得生物油。采用傅立叶变换红外光谱法和气相色谱-质谱法分析生物油的成分。结果表明,生物油中成分复杂,含有氧元素、多种有机化合物,主要包括酮类、醛类、酚类及羧酸类等。测定了20～80℃生物油的密度和粘度,发现生物油的密度与温度呈较好线性关系,而生物油的粘度均大于水的粘度,且不同熔盐体系对秸秆生物油的粘度无较大影响。     

Effect of degree of deacetylation of chitosan on the kinetics of ultrasonic degradation of chitosan

The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003     

分解炉扩径的技术改造

我厂3号回转窑(Φ4m×60m)生产线在1996年年底由SP窑(产量912t/d)改为NSP窑(产量1320t/d),预分解系统为四级旋风预热器带离线式分解炉     

Process of acceleration of filtration of viscose

Conclusions It is significant that the purification on a single passage of viscose through porous ceramic corresponds to the result of a two-stage filtration of it in industrial filter-presses with standard fillings.Kiev Combine. Kiev Technological Institute of Light Industry. Translated from Khimicheskie Volokna, No. 3, pp. 20–22, May–June, 1969.