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Current Issue
1999 Vol.16 Issue.3,
Published 1999-07-15
Article
Article
3
Study and Simulation on Reverse Jet Loop Reactor with Draft Tube
Wang YipingZhang JinliGuo Cuili
The mathematical model of liquid flow under pipe flow region in reverse jet loop reactor was deduced from equation of twodimension pseudohomogeneous phase,solutions of the model agreed with experimental data.Local fluid property of the reverse jet loop reactor with draft tube was investigated in airwaterglassy ball system.Effects of working conditions and structural parameters on flow state in the reactor were studied.
1999 Vol. 16 (3): 3-6 [
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Liquid Circulation Velocity in Internal Loop Airlift Reactor with a ConvergenceDivergence Draft Tube
Wei ChaohaiXie BoWu ChaofeiXiao HongliangTan Yingke
Liquid circulation velocity of an internal loop airlift reactor was studied.The bioreactor consists of one conventional draft tube and three convergencedivergence draft tubes.Experiments were performed with airwater and airCMC solution twophase system and airwaterresin particle threephase system.It was shown that liquid circulation velocity increases with the increasing of gas velocity.At the same superficial gas velocity,liquid circulation rate for airlift loop reactor with different convergencedivergence draft tubes is obviously lower than that for airlift loop reactor with a conventional draft tube.Liquid circulation velocity decreases with the increasing of CMC solution viscosity in airCMC solution twophase system and with the increasing of resin particle loading in airwaterresin particle threephase system.Based on an energy balance over the loop,a mathematical model was derived to estimate liquid circulation velocity in the riser and in the downcomer for airwater twophase system.The value pre
1999 Vol. 16 (3): 7-12 [
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1643
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13
Theoretical Study on Syntheis of Percarbamide
Zhao Hongkun
The preparation method of percarbamide is discussed in detail according to solubilities of the system CO(NH2)2H2O2H2O at 0 and 10.The yields of product and the utilization rate of hydrogen peroxide were determined at differnet ratio of urea to hydrogen peroxide.
1999 Vol. 16 (3): 13-16 [
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1815
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17
Major Parameters during Design and Scaleup with Relation to Air Lifted External Loop Slurry Reactor
Li TianchengXin FengWang FuminLiao Hui
The current situation of industrial use and the developing tendency on air lifted external loop slurry reactor is introduced.Furthermore the relationships among influential factors are revealed and the determining methods about major parameters are provided.In addition,the viewpoints on air lifted external loop slurry reactor are raised and the experimental results are explained.Then, the developing tendency and the studying emphasis about this kind of reactor is put forward.
1999 Vol. 16 (3): 17-23 [
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1583
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24
A Study on the Gasholdup in Threephase Reciprocating Sieve Plate Column
An GangSun BoWang NinghuiXiao RutingQiu Wenjiang
The gasholdup of gasliguidsolid three phase concurrent upflow in a reciprocating sieve plate column was investigated.The effect of the motion of the reciprocating sieve plate on the gasholdup was analyzed.
1999 Vol. 16 (3): 24-28 [
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1844
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29
Brief Introduction of Application and Research in Freeze Concentration Technology
Liu LingXue Yi
The basic principle and current situation of freeze concentration are introduced briefly.The trends of development and present issues in suspension crystallization freezeconcentration and progressive freezeconcentration are also elaborated and analyzed respectively.
1999 Vol. 16 (3): 29-34 [
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1723
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35
The Progress in Research of Low Temperature Flow Improver for Diesel Fuel
Guo CuiliZhang JinliWang Yiping
This article reviews the evalution method,action mechanism,susceptibility,important variety commercially available and their preparation methods of low tempreture flow improver for diesel fuel.
1999 Vol. 16 (3): 35-40 [
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1550
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41
Dynamic Controlled Cycling Distillation Technique
Song BaodongBai Peng
In recent years,much more attention was paid to the controlled cycling distillation technique.The experimental research progress on this technology was reviewed and the mathematical models of the process were classified and discussed.
1999 Vol. 16 (3): 41-46 [
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1573
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47
A Simple Method to Determine Flame Temperature of Emulsion Fuels
He ZhanboZhang Fengcai
A simple method to determinate flame temperature of emulsion fuels had been designed in order to overcome some shortages of existing photometry.In the article,a schematic diagram of the experimental apparatus had been shown in which the burner is a combustion tube with a piston and a chimney is used to decrease the effect of wind and improve combustion.The determination of flame temperature is by a thermocouple wire.
1999 Vol. 16 (3): 47-49 [
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1699
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50
Operation Scheme of Desulfurization from Acid Waste Gases with Higher Content of H2S and Larger CO2/H2S Ratio
Cao ChangqingYe QingguoJiang Yiwen
A procedure simulation system of desulfurization with MDEA is made on the basis of penetration theory with related data.The system applies the available process of selectively separating H2S from natural gas and refinery gas with MDEA to dispose of acid waste gas,which contains higher content of H2S,higher propotion of CO2 to H2S and other impurities.On the basis of simulation result,the cause of the system failing to dispose the acid waste gas is found out and the bottleneck restricting the production capacity is determined,then an optimization scheme is put forward..
1999 Vol. 16 (3): 50-54 [
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1613
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Synthesis of Aminoxyacetic Hemihydrochloride
Zhang XiaoruWang DonghuaChen Ligong Wang DuoluZhang HaiguangSong Chuanjun
The synthetic routes for aminoxyacetic hemihydrochloride were investigated,For preparation of animoxyacetic hemihydrochloride from acetone oxime and chloroacetic acid,the reaction parameters including catalysts,solvents,molar ratio and temperature were optimized. Under the optimized condition,aminoxyacetic hemihydrochloride was obtained above 40% yield on the basis of acetone oxime.
1999 Vol. 16 (3): 55-58 [
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1667
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59
The Preparation of the Stable Chlorine Dioxide and the Research on It's Stability
Yin ChangchunZhao XiaojunWang BaofengGuo ZhenduoMei Zukui
Stable chlorine dioxide is a new type of disinfectant and it has a wide range of developing prospect.Preparation of stable chlorine dioxide using sodium chlorite as the raw material,has been studied.The relationship between the amount of adding water and the concentration of the stable chlorine dioxide and the stability of stable chlorine dioxide has been discussed.All of which has practical value to extend the application of the stable chlorine dioxide.
1999 Vol. 16 (3): 59-61 [
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1762
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62
1999 Vol. 16 (3): 62-64 [
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1316
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