基于LabVIEW与ADAM模块的真空树脂灌封监控系统

设计了一种新型的小功率太阳能电池真空树脂灌封监控系统,该系统以ADAM6000模块作为现场数据采集单元,采用Lab VIEW作为软件开发平台,通过Modbus协议实现ADAM6000模块和LabVIEW软件的通信。同时详细介绍了系统架构、硬件设计选型和软件设计配置。     

ADAM模块及PID自整定仪在酸站的应用

我公司三纺酸站自控系统采用的是一套Honeywell S9000系列产品,几年来,由于酸站环境恶劣,易腐蚀,造成自控系统硬件损坏,导致整个系统瘫痪。我们经过调研决定采用研华ADAM模块和PID自整定仪来替代易受腐蚀的Honeywell S9000系统。ADAM模块具有自身实现数据采集功能,集成度高,抗腐蚀性强,而且测量精度较高。单台PID控制仪表控制各单回路,这样就不会出现系统原因导致工艺停车,确保整个系统更加完善可靠。系统原理如图一。     

计算机技术在硝盐及采输卤系统中的应用

简要介绍我公司在盐硝生产中应用ADAM - 5 0 0 0系统的情况 ,在采卤输卤数据采集中应用Lonworks系统的情况     

我厂大砖窑的技术改造

将槽子窑改造成带有换热器的倒焰窑作为大砖窑,可满足无槽垂直引上工艺中对引砖、托砖、大梁砖和L型砖烧成的要求,达到较高的烧成温度,对煤质的要求和煤耗可降低,操作环境改善,经济效益提高.     

西京水泥厂QCS生料质量控制系统与DCS系统通讯的设计与应用

本文以西京水泥厂为例，介绍了台湾研华的ADAM系列控制模块在QCS生料质量控制系统中通讯应用的情况。     

重金属Cd烧砖过程挥发特性研究

为了探究固体废物中Cd元素在砖窑协同处置时的挥发及固化规律,用Cd O和Cd Cl_2·2.5H_2O模拟普通固体废物和高氯固体废物中重金属Cd的赋存形态,通过热重分析实验探究纯重金属试剂的高温挥发规律,通过管式炉中试实验模拟烧砖过程,获取不同温度下Cd的挥发率和固化率,通过线性拟合的方式求得Cd在砖窑处置下的挥发动力学模型。结果表明:Cd O试剂在升温至400℃时的失重量为4.54%,此后直至温度升至1 000℃才开始二次失重;Cd Cl_2·2.5H_2O试剂升温至100℃失重8.87%,在680℃失重量为88.45%,随后保持稳定。含Cd O的模拟烧结砖在低温区(400～700℃)的固化率较高,为96.87%～85.53%,Cd Cl_2·2.5H_2O在低温区固化率较低,为87.18%～71.55%。最终得到Cd O和Cd Cl_2·2.5H_2O在砖窑烧结过程中挥发动力学模型分别为a=1-exp(-0.659exp(-1249/T)t)和a=1-exp(-1.059exp(-1439.3/T)t)。     

计算机监测系统在热力管理系统中的应用

本系统采用研华工控机与ADAM－4000系列智能模块,实现了整个热力车间系统各生产环节重要参数的监测与管理。系统的应用提高了管理上的自动化和现代化水平,减少了劳动强度,规范了现场管理,是企业技术进步的一个重要指标。     

微反-色谱联合装置控制系统

微反--色谱联合装置，能实现试验过程与色谱在线分析同步进行。控制系统由IPC610／PⅡ工控机及ADAM4000系列数据采集模块构成，对温度、压力、流量进行检测与控制，对八通阀进行顺序控制，实现自动取样分析，取得了理想的应用效果。     

关于煤气热值低导致煤气喷枪口冒“水滴”的答疑

问：我厂现有两组生产线，窑炉约160m，一组两次烧成瓷片生产线，一组仿古砖生产线（釉面地砖）。自改烧水煤气后，煤气压力要求越来越大，最早瓷片投产时是8kPa烧成。当在仿古砖窑时加上改烧煤气后已经难以满足生产温度的要求。煤气站总压要求13kPa以上，有时还难以升温。煤气内水分显得越来越重。     

利用回收砖窑废气制硫酸铵

利用回收砖窑废气来制造氮肥,不仅开辟了煤炭综合利用的新途径,而且也是“变无用为有用”为农业生产增产粮食找到了一个具有群众性的广大的肥源。为了解决这一问题,山西农学院化肥厂的几十位职工与该院师生以忘我的劳动热情和无比的革命干劲,投入了这项制造研究工作。并且取得了工业制造上的基本成功。基本原理砖窑排出的废烟中含有有用的化学成份,主要是氨和为数不多的酚和萘等。废烟经过收集、冷却和用芒硝水吸收,即可得到煤焦油和含有     

Non-Invasive Temperature Monitoring in Freeze Drying: Control of Freezing as a Case Study

In this study, a new technology, based on the use of an array of thin-film thermocouples, is proposed for the real-time and non-invasive monitoring of product temperature during a freeze-drying cycle. This array of thin-film thermocouples was demonstrated to give quantitative accurate results without altering the freezing and drying behavior of the monitored vials, making this sensor a good alternative to conventional wire thermocouples. Furthermore, unlike conventional thermocouples, the array of thin-film thermocouples can measure the entire temperature profile within the product being dried and can also measure the position of the interface of sublimation. This information was then used to estimate the heat and mass transfer coefficient of the system under investigation, showing a fairly good agreement with data obtained by conventional, time-consuming procedures. Finally, it is shown how these parameters can be used to guide the lyophilization professional during the cycle development.     

砖瓦土窑结构的研究

本文给出了一种历史悠久的用独特技术烧制青色砖瓦的传统砖瓦土窑的结构，并对其各部分结构，作用，特点进行了剖析。     

Polymer-derived ceramic thin-film thermocouples for high temperature measurements

Thin-film thermocouples are used as temperature detection components in aircraft engines. However, the preparation of traditional thin-film thermocouples is complex, and their high-temperature stability performance attributes are poor. In this study, polymer-derived ceramic (PDC) technology is introduced to prepare polymer-derived ceramic thin-film thermocouples. Due to the superior high-temperature and adhesion performance characteristics of polymer-derived ceramics and the protective effects of the products of polymer precursors on the thin films, the performance attributes of thin-film thermocouples are greatly improved. After simplifying the preparation process and outputting a large thermoelectric potential, the polymer-derived ceramic thin-film thermocouple exhibits good repeatability, stability, and thermoelectric potential output consistency. At 1200 °C, the peak output is 203 mV, and the average Seebeck coefficient is approximately 182 μV/°C. The temperature measurement error is 0.316%. In the 8-h drift test, the coefficient first increases at 1.26 °C/h and then steadily decreases at −0.63 °C/h. This polymer-derived ceramic thin-film thermocouple has excellent performance and can be applied to the in situ monitoring of thermal components in high-temperature and harsh environments, such as engines.     

ADAM5000系列的DCS控制在煤气炉改造中应用

某厂选用ADAM5000系列的DCS对煤气发生炉控制系统进行改造。介绍了煤造气工段的主要工艺流程,控制系统的构架、硬件配置及系统监控。改造后,该控制系统已稳定运行了一年多,效果良好。     

Monitoring the curing process of reinforced plastics structures

The feasibility of monitoring curing processes in large reinforced plastics structures by electrical volume resistivity techniques has been studied. It has been found, by embedding electrodes and thermocouples within a heavy-walled structure during fabricaton and by monitoring the change is resistance during the curing process, that information indicative of the rate and extent of curing can be obtained. The resin system used in this study was Epon 826/MNA/BDMA.     

Ni45Cr17Al镍基合金在焚硫炉测温装置上的应用

主要介绍了硫磺制酸中几种焚硫炉测温热电偶的材质及使用情况,分析了热电偶易发生故障的原因。通过对几种材料的应用实践,选用镍基高温变形合金材料(Ni45Cr17Al)作保护套管,很好地解决了焚硫炉测温热电偶易坏问题。该热电偶可准确测量焚硫炉温度,为装置长周期稳定运行提供了保障。     

Hydrolysis kinetics and mechanism of adipamide in high temperature water

Adipamide (ADAM) served as a model to investigate the hydrolysis kinetics and mechanism of diamides in high temperature water. The major reaction products resulting from the hydrolysis of ADAM, primarily including adipamic acid and adipic acid, were detected. Effects of temperature, time, pressure, and pH on ADAM hydrolysis reaction kinetics have been investigated. The hydrolysis reaction is first order in ADAM at the temperature ranges investigated. The conversion is pH dependent, and three distinct regions of pH dependence exist. At low and high pH, the conversion increased rapidly with added acid and base, respectively. At near-neutral pH, however, the rate was essentially insensitive to changes in pH. The high content of adipamic acid in the reaction products at the initial hydrolysis reaction stage suggested that only one amide group was attacked at one time and then followed by transformation to a carboxyl. The reaction rate constants, average apparent activation energy and pre-exponential factor were evaluated according to the Arrhenius equation. Based on the experimental results, hydrolysis reaction scheme and mechanism were proposed.     

熔盐冷冻壁厚度测量方法

熔盐冷冻壁防腐蚀技术是采用凝固熔盐层阻止气液介质与金属器壁直接接触,冷冻壁厚度的准确监测及控制是其成功应用的关键。本文以混合硝酸盐熔盐为实验介质,研究了冷冻壁形成及维持过程中不同在线厚度监测方法,并与机械卡尺的直接测量值进行对比分析。结果表明,温度梯度推算法在非稳态及厚度较小时误差较大,在平衡维持态时则能较准确地判定厚度,但需要设置合适的热电偶组;冷却热量推算法可通过外夹套换热量及换热壁面温度推算冷冻壁厚度,但其稳定性及准确性取决于冷却量的精确衡算,其优点是不需增加额外设备;在线图像处理法能比较直观地反映冷冻壁厚度,但需要配备稳定可靠的高温摄像系统。鉴于未来熔盐冷冻壁应用是在无水无氧密闭容器中,这几种在线监测方法在真实高温熔盐化学体系的适用性还有待于进一步研究和评估。     

全电动注塑机中的高精度温度控制要素研究

从软件和硬件分析影响全电动注塑机温度控制的要素,并且针对具体的加热设备,如操作系统的加热参数优化,热电偶的更换等提出建设性的改善方案,减少料管升温到稳态后的与设定温度的偏差值。结果表明,比例积分微分（PID）参数的自整定能够提高控制的效率,减少超调和稳态时间;通过对注塑机温度的测量,温度的偏差能够达到±0.2 ℃。     

MODIFIED DIFFERENTIAL THERMAL ANALYSIS APPARATUS*

The differential thermal analysis apparatus described consists of an important improvement. This is the arrangement of the sample and standard holder so that the thermocouples become both the holder and the differential temperature measuring device. This arrangement permits easy removal of the sample and also permits the investigation of exothermic and endothermic reactions at much higher temperatures without damage to the thermocouples.