Control System of Alkali Reclaim Evaporation Section Based on PLC 基于PLC的碱回收蒸发工段控制系统的设计
A communication net design based on ProfiBus-DP and Ethernet, which can meet the DCS control requirements in evaporation workshop section of alkali reclaim, and the system safety protection design are introduced in this paper. 针对碱回收蒸发工段的DCS的控制要求,介绍了一套适合该工段的基于ProfiBus-DP与Ethernet的通信网络设计及其系统安全保护设计。
Study of enhanced internal heat transfer for evaporation section of thermosyphon 热虹吸管蒸发段内部强化传热的研究
According to the bad effects of electrolyte preheating in evaporation section, electrolyte preheating process was innovated from two aspects of process and equipment. And economic performance was analyzed. 针对蒸发工段电解液预热效果不理想,从工艺、设备两方面入手,对电解液预热工艺进行了改造,并对经济效益进行了分析。
The increase of heat transfer rate with the increase of length ratio is not obvious when the length ratio of condensation section to evaporation section is larger than 0.9. Consequently, the optimum length ratio of a little larger than 0.9 is suggested. 在冷凝段与蒸发段长度比大于0.9的条件下,热管传冷量随长度比增大得并不明显,因此建议优化的冷凝段与蒸发段长度比取为稍大于0.9的值;
Summary on process innovation of electrolyte preheating in evaporation section 蒸发工段电解液预热工艺改造总结
The soil evaporation between different section of slope has no significant difference. 不同坡位间的土壤蒸发没有显著差异。
The head-on speed of wind only stranger the heat transfer of the evaporation section and the condensation section. 迎面风速的大小,起到强化热虹吸管蒸发段和冷凝段换热的目的。
For different incident energies and different angular momentum, the effects on fusion and survival probability and the contribution to evaporation residue cross section have been given. 计算了不同入射能量时各角动量分波对熔合概率和超重核存活概率的影响以及对蒸发剩余截面的贡献。
Their establishment supplies the fair groundwork for conventional PID control and other complicated, intelligent controls in the evaporation workshop section of alkali reclaim. 它们的实现为在碱回收蒸发工段中实施常规PID控制及复杂的智能控制提供了良好的基础。
Design and Realization of the Communication Net of the DCS in Alkali Reclaim Evaporation Workshop Section 碱回收蒸发工段DCS中的通信网络设计与实现
The expand of dive evaporation will strengthen the supply of soil moisture, and hydrology conditions of section. 分析表明:潜水蒸发对土壤水的补给作用越强,剖面水分条件越好;
The corresponding and reasonable correlations of filling rates derived from the regression of experimental data were in good agreement with the experimental results, and were compared with the flow characteristics of the vertical evaporation section. 由试验数据回归整理了相应的合理充液率关系式,与试验数据吻合较好,并与垂直蒸发段的流动特性进行了比较。
The dynamic responses of parameters of evaporation section under main disturbance of control variables are presented by simulation. The results are referable for the explanation of physical phenomena in evaporation section as well as the designing and setting of the control systems. 仿真试验得到了主要操作变量扰动下蒸发区参数的动态响应过程,其结果可为解释蒸发区的物理现象以及控制系统的设计和整定提供一定的参考。
EVAPORATION WORKSHOP DISTRIBUTED CONTROLLED SYSTEM CONTROL This paper introduces the successful application of hA series DCS in the evaporating workshop section of Shanxi Aluminium Plant. 纸机碱回收蒸发工段DCS控制本文主要介绍了Foxboro公司的I/Aseries集散系统在山西铝厂蒸发工段的应用情况。
The evaporation model of micro heat pipe with triangular cross section was presented by analyzing both the heat transfer through the thin liquid film and the heat conduction along the heat pipe wall. 通过对薄液膜蒸发传热以及热管壁轴向导热的分析,对三角形截面微型热管的蒸发段建立了蒸发传热模型。
Process study and production practice of barium sulfate from residue liquor of barium chloride evaporation section 用氯化钡蒸发残液生产硫酸钡工艺研究及生产实践
Next, in the "evaporation" formula of the energy spectra, the absorption cross section of the optical model is employed. 其次,考虑到在能谱的蒸发公式中应该用光学模型的吸收截面。
As the particle diameter increases, the heat transfer coefficientof the evaporation section first decreases and then increases, but the change of heattransfer coefficient in condensation section goes the opposite. 用POM颗粒研究了颗粒粒径对重力热管传热系数的影响,发现蒸发段传热系数随粒径的增大会先减小后增大,而冷凝段传热系数的变化则相反。
The axial pressure, temperature, velocity and evaporation rate are predicted by the model and it is found that variations of parameters principally occur in the transition section and the junction site. 模型求解可以得到转油线内压力、温度、流速和汽化率沿转油线轴向的变化情况,结果表明,各参数的变化主要发生在过渡段和合流段,低速段变化不大。
In order to study micro-scale methanol hydrogen technology, through EDM technology, an integrated micro-reactor was developed, which achieves several features, such as a fuel preheating, evaporation, reforming reaction, and re-substitution reaction section. 为了研究微尺度下的甲醇制氢技术,利用电火花技术研制了一种集成微反应器,该反应器实现了燃料预热、蒸发、重整及反应段替换等多项功能。