共查询到20条相似文献,搜索用时 851 毫秒
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李朝阳 《化工自动化及仪表》2016,(4):412-415
依托物联网技术和智能终端,设计针对自动化仪表和控制系统设备全生命周期的维护系统,实现了仪表和设备信息的及时更新,设备变更、检修情况及缺陷等信息的及时更新。 相似文献
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《化工自动化及仪表》1977,(2)
6-25带有正迁移的差压变送器怎样校验校验步骤: 1.外观检查:检查一下各部件是否有明显缺陷。 2.接线检漏:校验设备接线和准备工作与普通差压变送器一样,输入信号也加入正压室,负压室通大气。 3.迁移调零:以气动定值器向正压室加入迁移信号P=H_0γ,此时输出风压应指示迁移量,可能很大甚至超出仪表测量范围,按挡板离开喷咀方向调整迁移弹簧,使输出 相似文献
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选用、设计喷漆室及相关设备的经验谈(I) 总被引:1,自引:0,他引:1
从工业涂装用喷漆室的功能、分类、喷漆室系统设备及其组成、设计参数及其选择,以及设计使用中的注意事项等方面介绍了近20年中作者选用、设计和研究喷漆室及相关设备的经验. 相似文献
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水泥窑尾电除尘器作为一种高效的烟气粉尘分离收集设备,是水泥生产工艺系统中的一个重要设备,通常其运行操作压力为负压。但也有少数水泥生产工艺出于系统其他方面考虑而将窑尾电除尘器运行操作压力改为正压,这就使得常用的负压操作电除尘器设计方案必须要做针对性的设计改进才能满足水泥生产工艺系统及污染物排放要求。本文将针对正压操作电除尘器的特殊情况来做设计和运行方案。 相似文献
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Experimental measurements of hydrodynamics and the volumetric mass transfer coefficient of oxygen (VMTCO) in an internal loop airlift reactor with different types of draft tubes are reported for the two‐phase systems, air/water and air/carboxyl methyl cellulose (CMC) solution, and a three‐phase system, air/water/resin particle, respectively. The properties of convergence‐divergence draft tubes with three different structural parameters are compared with those of the conventional column draft tube. The results indicate that gas holdups in convergence‐divergence draft tubes are higher than those in conventional draft tubes, the volumetric mass transfer coefficient of oxygen increases with increasing superficial air flow rates. The convergence‐divergence draft tubes all show higher mass transfer capacity than the traditional ones. A 10% higher mass transfer coefficient is observed for the three structural parameters. In the air/CMC system, the volumetric mass transfer coefficient of oxygen decreases with increasing bulk viscosity, while in the three‐phase system VMTCO increases with the resin particle loading. The correlation equation of the volumetric mass transfer coefficient with the operating conditions and structural parameters is established. 相似文献
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Effects of various operational parameters, such as draft tube superficial air velocity and solid inventory and design parameters such as jet diameter and clearance between perforated plate and draft tube bottom on the solid circulation rate of a recirculating fluidized bed are studied. A simple butterfly valve arrangement was used for the direct measurement of the solid circulation rate. 相似文献
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The fundamental laws of gas flow are applied to the movement of gases through down-draft kilns. Data on pressure conditions in four kilns are presented graphically. The cause of draft, the superiority of the down-draft over the up-draft kiln, the significance of stack draft, the relation of draft and excess air, features of kiln design, and the comparative merits of forced, induced and natural draft are discussed. 相似文献
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浮法玻璃锡槽槽底冷却风系统优化节能措施 总被引:1,自引:0,他引:1
在浮法玻璃生产线中,锡槽槽底冷却风系统是保障锡槽安全运行的关键系统之一。本文从设备选择与布置、特别是喷嘴布置及控制系统等方面介绍了冷却风系统中一些行之有效的优化和节能措施。 相似文献
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为建立室内生物污染物动力学模型,研制了30 m3可控通风生物学实验舱,为研究室内气体中病原体如细菌,病毒等在室内气候环境下的动力学提供了实验平台。采用不锈钢及钢化玻璃为主体框架搭建长4 m、宽3 m、高2.5 m的长方体密闭舱;舱内配备防护器材、气体发生及采样设备、消毒设备、排风净化装置及控制装置等设备。运行30 m3可控通风生物学实验舱进行室内多种适合人居住气候的模拟,各项指标均达到设计要求。 相似文献