1) multi-effect evaporation
多效蒸发
1.
The computer-aided calculation of cocurrent multi-effect evaporation;
并流多效蒸发系统的计算机辅助计算
2.
Process Simulation and Operation Optimization of Complex Multi-effect Evaporation;
复杂多效蒸发过程模拟与操作优化研究
3.
The Energy Saving Study of Multi-effect Evaporation Based on Genetic Algorithm;
基于遗传算法的复杂多效蒸发系统节能技术研究
2) multi-effect distillation
多效蒸发
1.
A process of multi-effect distillation desalination system combined with two-stage lithium bromide(LiBr)ab- sorption vapor compression(MED-ABVC)was presented,and its mathematical model and thermal analysis were per- formed.
提出了两级吸收式热泵多效蒸发海水淡化工艺流程,并建立了系统的数学模型。
2.
A physical-mathematical model was developed to explore the thermal hydraulic performance of a vertical tube multi-effect distillation seawater desalination system coupled with the nuclear heating reactor.
针对与低温核供热堆相耦合的竖管多效蒸发海水淡化系统 ,建立了物理数学模型 ,探讨该系统的热工水力学特性。
3.
The control model for dynamic startup process of the vertical tube evaporator(VTE)-multi-effect distillation(MED) seawater desalination system was established by using a developed code based on the non-linear differential equations for system design and performance analysis.
建立大型竖管多效蒸发海水淡化系统的动态启动控制模型,通过数值分析研究,对系统的启动过程和启动特性进行理论探索。
3) multiple-effect evaporation
多效蒸发
1.
he heat balance calculation niethod is proposed for the forward feed multiple-effect evaporationprocess with solid separation on the basis of the method proposed by Kichizin and Kostento,and the it-erative procedures are presented for the process by use of phase diagram.
在齐-柯法的基础上,提出了一种有固相析出的顺流进料多效蒸发过程热量衡算方法,并结合相图给出了蒸发过程物热衡算的逐步逼近计算步骤。
2.
Aiming at exploring the possibility of building a model by artificial neural network for the multiple-effect evaporation in sugar factory,the error BP(BackProragationn)eural network is used to establish a model and describe the complex relationship among the juice steam pressure P1P、2 of the first and the second stage and the syrup brix C5 leaving the multiple-effect evaporator.
研究了人工神经网络技术在糖厂多效蒸发过程建模中应用的可行性,采用误差反向传播网络(BP网)建立了一效、二效汁汽压力P1、P2和出口糖浆的锤度C5之间的两输入单输出神经网络模型,借助MATLAB7。
3.
Applying the theory of heat balance to establish the calculating equations on energy consumption of multiple-effect evaporation.
应用热平衡理论,导出并建立了多效蒸发能耗的计算方程,对编制计算程序提供了方便。
4) multi effect evaporation
多效蒸发
1.
With the total expense as a target and two pressures as decisive variables, the optimal object function of the multi effect evaporation process was derived.
以蒸发总费用为目标,以两个压力为决策变量建立了多效蒸发过程的优化目标函数,用BFGS法求得了其最优解。
2.
The optimum design software of multi effect evaporation system was programmed using Visual Basic 5 0.
利用VisualBasic 5 0语言开发多效蒸发系统优化设计应用软件。
5) multiple effect evaporation
多效蒸发
1.
In this paper,heat balance calculating methods are put forward for crossflow(mixed)feed multiple effect evaporation processes with solid separation.
本文提出了有固相析出的错流进料多效蒸发过程的热量衡算方法,并给出了利用本文热量衡算方法结合相图计算进行有固相析出的多效错流蒸发过程的物料衡算和热量衡算的逐步逼近计算步骤。
补充资料:多效蒸发
将几个蒸发器串联运行的蒸发操作,使蒸汽热能得到多次利用,从而提高热能的利用率,多用于水溶液的处理。在三效蒸发操作的流程(见图)中,第一个蒸发器(称为第一效)以生蒸汽作为加热蒸汽,其余两个(称为第二效、第三效)均以其前一效的二次蒸汽作为加热蒸汽,从而可大幅度减少生蒸汽的用量。每一效的二次蒸汽温度总是低于其加热蒸汽,故多效蒸发时各效的操作压力及溶液沸腾温度沿蒸汽流动方向依次降低。依据二次蒸汽和溶液的流向,多效蒸发的流程可分为:①并流流程。溶液和二次蒸汽同向依次通过各效。由于前效压力高于后效,料液可借压差流动。但末效溶液浓度高而温度低,溶液粘度大,因此传热系数低。②逆流流程。溶液与二次蒸汽流动方向相反。需用泵将溶液送至压力较高的前一效,各效溶液的浓度和温度对粘度的影响大致抵消,各效传热条件基本相同。③错流流程。二次蒸汽依次通过各效,但料液则每效单独进出,这种流程适用于有晶体析出的料液。
在生蒸汽温度与末效冷凝器温度相同(即总温度差相同)条件下,将单效蒸发改为多效蒸发时,蒸发器效数增加,生蒸汽用量减少,但总蒸发量不仅不增加,反而因温度差损失增加而有所下降。多效蒸发节省能耗,但降低设备的生产强度,因而增加设备投资。在实际生产中,应综合考虑能耗和设备投资,选定最佳的效数。烧碱等电解质溶液的蒸发,因其温度差损失大,通常只采用2~3效(见彩图);食糖等非电解质溶液,温度差损失小,可用到4~6效;海水淡化所蒸发的水量大,在采取了各种减少温度差损失的措施后,可采用20~30效。
在生蒸汽温度与末效冷凝器温度相同(即总温度差相同)条件下,将单效蒸发改为多效蒸发时,蒸发器效数增加,生蒸汽用量减少,但总蒸发量不仅不增加,反而因温度差损失增加而有所下降。多效蒸发节省能耗,但降低设备的生产强度,因而增加设备投资。在实际生产中,应综合考虑能耗和设备投资,选定最佳的效数。烧碱等电解质溶液的蒸发,因其温度差损失大,通常只采用2~3效(见彩图);食糖等非电解质溶液,温度差损失小,可用到4~6效;海水淡化所蒸发的水量大,在采取了各种减少温度差损失的措施后,可采用20~30效。
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