回流比

全精馏制氩中回流比R的抉择与讨论&低温全精馏制氩工艺计算演绎续

Selection of reflux ratio R in argon recovery utilizing a full rectification process and relevant discussions

利用PRO/Ⅱ和Excel求解精馏塔最优回流比

Determination of optimum reflux ratio of distillation column using PRO / ⅱ and Excel

推导出估算气提塔出水回流比R的模型；

A model for estimating the recycle ratio of the effluent from the stripper was established .

基于PLC的间歇精馏回流比控制系统

Batch Distillation Reflux Control System with PLC

该文得出了二元精馏计算中进料状态参数为任意值时最小回流比R＿m的计算方法。

This paper presents the calculated method of the minimum reflux ratio Rm when the state parameter of inputing material q is of any value .

当CODcr/TN4时，内回流比r成为该新型工艺除磷的主要限制因素。

On the other hands , in the case of CODcr / TN4 , interior return ratio r is the main limited factor for phosphorus removal .

当硝化液回流比达到300%时，系统对TN的去除效率达到80%。

The removal rate was 80 % when the internal recycle ratio was 300 % .

用microsoftexcel计算二元理想物系复杂精馏塔的回流比和理论板数

A Method for the Reflux Ratio and the Number of Theory Plates of Binary Ideal Solution Complex Distillation Tower by Using Microsoft Excel

当CODcr/TN>4时，硝化液回流比R成为该新型工艺脱氮的主要控制因素，脱氮效率随着进水有机物浓度的降低而下降。

When the ratio of CODcr / TN > 4 , the removal of N is subject to the return ratio R , and less influenced by the inlet organic concentration .

首先求解了设计型变量塔顶产品流量，回流比，理论板数和进料位置，然后给出精馏过程的数学模型MESH方程组。

Some variables such as production flow , rate ratio , theoretic tray counts and theoretic input place are gained , and the mathematical model MESH equations are brought out .

随着回流比的增大，再沸器和冷凝器中HD浓度均减小；

As the reflux ratio increases and the feeding point moves towards the bottom , HD concentrations in condenser and reboiler are decreased .

试验中确定了混凝气浮工艺的各种最佳参数，包括：混凝剂种类、剂量、pH、处理时间、搅拌强度、气压以及回流比。

Various kinds of best parameters of air flotation is found , including : coagulant kind , dosage , pH , deal with time of , mixing intensity , atmospheric pressure and backset current than .

用Underwood法确定复杂精馏塔最小回流比。

The Underwood method has been used to calculate minimum reflux ratio for complex columns .

在中试的基础上进行了污泥回流比（R）对复合式生物膜-活性污泥工艺处理城市污水的效能和微生物特性的影响研究。

The effect of return sludge ratio ( R ) on the performance of hybrid biofilm-activated sludge process on treating domestic wastewater as well as property of microorganisms was investigated respectively in this paper on the base of pilot-scale test .

工艺适宜的运行参数为：阶段时间设置为3h、3h、2h、3h、3h、2h，气水比为20，污泥回流比30%。

Appropriate operation parameters were : phases-time setting was 3h , 3h , 2h , 3h , 3h , 2h ; gas / water was 20 , sludge return ratio was 30 % .

精馏过程回流比等参数对精馏ACAR循环的性能有非常重要影响，尤其使制冷剂配比对循环性能的影响呈现不同的变化规律，在相同外部工况下，精馏ACAR循环能获得最低的制冷温度。

Finally , the distillation ACAR cycle can achieve lowest refrigeration temperature among ACAR cycles under the same working conditions .

此外，工艺在较短的水力停留时间（6h）和较小的内回流比（100%）下能够实现较高的COD去除效率，体现出较强的耐有机负荷能力。

In addition , the process could achieve high COD removal efficiency in a relatively short period of HRT ( 6h ) and small reflux ratio ( 100 % ), which reflects the strong resistance to organic load capacity .

确定了回流比3.0下的共沸精馏塔的工艺参数：填料：钛质250Y板波纹填料，塔径：4.0m；

Technical parameters of azeotropic distillation tower were obtained when reflux ratio was 3.0 . Packing was 250Y titanium corrugated-plate packing .

试验采用A/O/O生物膜系统对锦纶废水进行处理，考察了硝化液回流比、水力停留时间、DO和进水COD及TN浓度对系统处理效果的影响。

An A / O / O biofilm process was studied for the treatment of Nylon-6 wastewater , and influence factors like nitrate recirculation ratio , HRT ( Hydraulic retention time ), DO as well as the influent COD and TN were investigated .

考察了环境因素，如温度、pH值、C/N、回流比和NH3-N负荷等对A/DAT-IAT处理ADC合成废水的影响，并分析其原因。

Research on environment factor , such as temperature , pH , DO , C / N , circumfluence ratio and NH_3-N load , which impact the result of ADC synthesize wastewater treatment by A / DAT-IAT technique and analyse these reasons .

单独使用ACF-MBR处理染整废水时，色度去除率随回流比的增大而显著降低。

When using ACF-MBR alone for dyeing wastewater treatment , color removal efficiency reduce with reflux ratio increasing significantly .

污泥回流比为75%、100%和150%时，随着污泥回流比的增大，系统出水TP逐渐升高，TP去除率有下降的趋势，厌氧池出水TP逐渐降低，本试验污泥回流比取为75%。

The effluent TP increased gradually with the sludge reflux ratio increased , the removal rate of TP was on a downward trend , effluent TP of anaerobic decreased . Considering the experiment , sludge return ratio of75 % was more suitable for the test .

共沸精馏模拟计算时，采用NRTL方程计算液相活度系数，Hayden-O'Connell关联式修正有缔合组分的汽相非理想性，得出的较佳的条件为：回流比3.0~3.5，理论板数30~35。

When azeotropic distillation was simulated , NRTL equation was used to calculate active coefficient in the liquid phase and Hayden-O'Connell equation was used to correct the nonideality of vapor phase with associated molecules .

对含固率为6%的污泥而言，回流比为2/3较适宜，脱毒处理8d后也可使铬去除率达到100%。

In the case of solid content of 6 % , sludge return ratio is preferable to be 2 / 3 , chromium removal rate can come up to 100 % after 8 days of reaction .

设计方法的研究是本文的重点，文中建立了用夹紧区原理准确求解分批精馏的最小回流比的方法，克服了用Underwood公式求最小回流比的不足；

Design of batch distillation was the focus of the paper . The method of determining minimum reflux ratio using the pinch zone theory was built , which got rid of the disadvantages of Underwood equation .

控制系统采用生物工艺智能优化系统（BIOS）与PLC智能控制系统相结合，对生物反应池的溶解氧DO和内回流比IRQ实现了稳定控制，保证了出水水质及节能降耗20～40%。

The control system use Biotechnology Intelligent Optimization System ( BIOS ) and PLC intelligent control system . The system can control algorithm of biochemical pool dissolved oxygen DO and internal reflux ratio IRQ , ensure water quality and energy saving effect 20 ~ 40 % .

应用改进的三对角矩阵法和UNIFAC模型，对粗甲醇预蒸馏塔进行了模拟计算，并对粗甲醇加水量、塔板数、回流比和进料位置等进行了分析和讨论。

The crude methanol pre-fractionator is calculated by the application of improved opposite triangle matrix technique and UNIFAC model , and crude methanol water addition , number of trays , reflux ratio and feed inlet location etc are analyzed .

根据回流比的变化，对顺流双效HGL精馏实验装置中两精馏塔的进料位置进行了优化。

By analyzing the changes of reflux ratio , the optimum feed positions within the two distillation columns in the experimental device for double-effects distillation HGL of forward feed was determined .

通过均匀实验设计得出，对于建立的精馏塔，蒸发功率为250W时，优化设计的操作条件为操作压力为54kPa，回流比为84。

By experimental uniform design , the optimized condition to the established column for the re-boiling power of 250 W was that the operating pressure was 54 kPa and the reflux ratio was 84 .

回流比3∶14，超声条件为25kHz，1W/mL，10min时，几乎不产生污泥。

When the reflux ratio was 3 / 14 with ultrasound condition 25 kHz , 1 W / mL , 10 min , there was nearly no excess sludge discharged .