The Analysis of Pollutant Emission Concentration  Limits Based on Total Quantity Control
JIA Fengrui，JIN Dun， LI Yulin， DONG Hui， WU Ming
2013, 33 (4): 1-3.
Abstract ( ) PDF ( 1471KB ) ( ) 　　
The total idea for waste water controlling was described and then the emission concentration limited of the chemical oxygen demand（COD）and the ammonia nitrogen（NH3N）for the Jinsha River, the Luanhe River and Dalinghe River were calculated respectively by twodimensional water quality model. The results show that the COD emission concentration limits of the three rivers were under the current standards. However, the NH3N emission concentration limits were all closed to or above the standards; the recommended COD and NH3N emission concentration limits were no more than 60 and 15 mg/L, respectively.
Related Articles | Metrics

Screen Adsorbents of Removing Propanal from  HighPressure Polyethylene Return Gas
XU Kaixiong, FU Gongyi, WANG Li,WU Shikui
2013, 33 (4): 4-8.
Abstract ( ) PDF ( 3063KB ) ( ) 　　
The experiment of screening agents of removing propanal has carried on. The experimental results showed that the removing rate of propanal by anion resin had reduced to less than 40% after adsorbing 120 minutes. And the removing rate of propanal by 3A molecular sieve had also reduced to less than 40% after adsorbing 200 minutes. But the removing rate of propanal by activate carbon still had about 60% after adsorbing 300 minutes. Propanal was removed more than 99% by sodium hydrogensulfite solution. The rate of removal propanal has been improved when increased the amount of 3A molecular sieve and activated carbon, which had a better absorbing effect for propanal. But the 3A molecular sieve had a smaller saturated adsorption. Meanwhile, activate carbon, which had a larger saturated adsorption for propanal, was choosed for the different feed gas flow rate and selectivity experiments. It was concluded that the removing rate of propanal was the highest in the feed gas flow of 30 mL/min and the lowest in the feed gas flow of 70 mL/min. And the ethylene adsorption rate of active carbon had reduced to less than 1% after adsorbing 40 minutes, what is more, the propanal removing rate of active carbon was nearly the same as the previous one.
Related Articles | Metrics

The Corrosion Reason of Water Cooler in Oil Refinery Plant
HOU Ling， LI Yinan， MIAO Wenhai， LUO Zongren
2013, 33 (4): 9-12.
Abstract ( ) PDF ( 2583KB ) ( ) 　　
The corrosion factors in cooling equipment of Liaoyuan refinery was studied in this paper, and it is shown that the main reason of serious corrosion is that high slime content in circulating water leads to the deposition of dirt, which makes heat transfer efficiency drop, and seriously affects the normal operation of the heat exchange. In addition, the growth of microorganisms in circulating water brings great harm to the circulating water equipment, a large number of microorganism mucus secretions made the impurity of water and a chemical precipitate adhesive in the heat exchanger surface, and further leads to the formation of mud and debris, and finally blockage of equipment and leakage would occur. The leakage of the equipment will cause the loss of corrosion inhibitor seriously, which increases the deterioration of water quality. The chloride or sulfate ions in the water will accelerate the pitting of the carbon steel.
Related Articles | Metrics

Analysis and Comparision of Character of Three Different Vegetable Gums
YAN Peng
2013, 33 (4): 13-15.
Abstract ( ) PDF ( 2305KB ) ( ) 　　
Select the level of guar gum, from the system of many plant gum fracturing fluid in sweet bean gum and bitter drabanemerosa hebecarpa glue for laboratory evaluation, based on the composition of powder, liquid viscosity, shear performance and evaluation of Nevinne, has advantages and disadvantages of several plant gum fracturing fluid system, the results show that: the three kinds of plant gum has the similarity in composition, are polyhydroxy compounds, at the concentration of 0.5%, bitter drabanemerosa hebecarpa viscosity maximum is 91.6 mPa·s, Nevinne shearing of three kinds of plant gum, can meet the requirements of construction site, a guar gum residue mass concentration is 23.3 mg/L minimum.
Related Articles | Metrics

The Relations of Glass Melter Silica Bricks Corrosion and Siliceous Defects
YANG Haitao, YANG Yuanyuan
2013, 33 (4): 16-20.
Abstract ( ) PDF ( 3201KB ) ( ) 　　
The defects including stone and stripes, coloring, bubble are analyzed in this paper. Based on the properties of silica brick, defect formation mechanism affected by erosion material microstructure and glass production process conditions has been investigated, and their influence on glass quality has been discussed as well. The results show that quartz crystal will be generated on the silica brick surface when the working temperature is above 1 470 ℃, and high temperature flue gas retention has an intensified impact on the crown and gable. With natural gas as raw material, the combustion air flow in No. 2# oven can reach 7 200 Nm3/h according to scheme 1.
Related Articles | Metrics

Processing Technology on the Regeneration of Spent Lubricating Oil
LIU Yin,CAO Zubin， SHI Weiwei,LI Dandong ZHAO Rui LI Jinsha, MENG Xiange
2013, 33 (4): 21-25.
Abstract ( ) PDF ( 2760KB ) ( ) 　　
The pretreatment of spent lubricating oil to remove part of the water and impurities was carried out firstly, then the flash device are used for further removal of water, followed by the distillation in atmospheric and vacuum distillation unit. A lowfreezingpoint, high stable light diesel were produced in the atmospheric distillation zone; different kinds of lubricating base oils which are all available resources were produced by vacuum distillation segment combined with complex agent refiningalkaline cleaningclay refining process. Additives were added finally to improve the oil quality. The additional purification process conditions were identified: the mass fraction of acid solvent 4.5% which contains the mass fraction complexing agent 1.5% for pickling; 1% NaOH aqueous solution with its mass fraction of 40% were added for alkaline cleaning at 40 ℃, then 3% clay was added and stirred for 25～30 min at the temperature less than 120 ℃. This processing technology not only reduces the pollution effectively, but also greatly improves the reutilization of waste oil.
Related Articles | Metrics

Effect of PModification of HZSM5 Catalyst on the Methanol to Propylene Process
ZHAO Lin， GUO Daguang， LI Wenshen， LI Shisong, LIN Yueming
2013, 33 (4): 26-29.
Abstract ( ) PDF ( 1915KB ) ( ) 　　
Pmodified HZSM5 catalysts were prepared by impregnation and used in the reaction of methanol to propylene as the catalyst. The effect of different phosphorous precursor amount on their catalyst characterization and catalytic performance is investigated. The results show that the amount of strong acid sites of phosphorus modified catalysts decreased, while that of weak acid sites increased. The increase of P loading with the range of 0% and 0.5% leads to the decrease of specific surface area and micropore volume, the increase of average pore size as well. However, there is no change in the framework and crystallinity. Compared with HZSM5, the stability of P/HZSM5 catalyst has been significantly improved, and the selectivity to propylene was significantly increased. And when the mass fraction of P is 0.25%, Propylene selectivity could be up to 54.6%.
Related Articles | Metrics

The Research on Lightning Protection of the NitrogenSealed Seal Ring of Floating Roof Tank Seals
WEN Jianjun， DING Bo， ZHANG Le
2013, 33 (4): 30-32.
Abstract ( ) PDF ( 1549KB ) ( ) 　　
Combustible gas within the limits of the explosive in sealed space of floating roof tank，could lead to explosion by lighting. In order to study the feasible technology about lighting of floating roof tank seal, concentration of oxygen remain below 8% was put forward through adding nitrogen into the sealed space, thus reduced the risk of explosion. By analyzing the change of oxygen concentration after injecting nitrogen into the sealed space, the relationship between the change of oxygen concentration and nitrogen injection was set up. At the same time, through the experiment when the sealed maintains the micro positive pressure, a formula was established about the nitrogen flow and micro positive pressure, which could obtain the amount of nitrogen directly under different wind speed and lightning time to complete inertly. The method provided a reference to blanketing technology applications in seals of floating roof tanks.
Related Articles | Metrics

Numerical Simulation of WaterOil Separation in  Spiral Pipe with Different Section Shapes
NIU Chenrui， MA Guiyang， ZHANG Xin， LI Liang， SHI Long， SUN Lei
2013, 33 (4): 33-36.
Abstract ( ) PDF ( 5536KB ) ( ) 　　
Spiral separator has the characteristics of simple structure, light weight and wellseparated effect, which becomes one of the commonest centrifugal separator currently. CFD method was used to simulate wateroil separation in spiral pipe under the condition of a variety of entrance velocities and cross section shapes, and obtained a wateroil separation result that for a spiral pipe with circular cross section shape, the separation effect became sharper as the velocity increased, and too fast or too slow velocity both impacted the effect. When they were equal cross section areas, circular had a better effect than laddershaped and square cross sections. Based on the numerical simulation, the result provided a certain theoretical basis for spiral pipe technology.
Related Articles | Metrics

Numerical Simulation of Reducer Pipeline at  Crossing Point of Batch Transportation
YANG Mingyue，WU Ming， ZHAO Ling， CHENG Mengmeng， 
2013, 33 (4): 37-40.
Abstract ( ) PDF ( 2383KB ) ( ) 　　
To study the impact of reducer pipeline on batch transportation of mixed product oil when there was a large drop at a crossing point, CFD multiphase flow model was used and transportation control equation was established based on petroldiesel oil mixture. Simulation about mixed volume of reducer pipeline placed in front of or behind the elbow was calculated and presented with pictures. The analysis show that when reducer pipeline placed in front of the elbow, the length of mixed oil was fairly equal and more diesel oil would mix into petrol under the petrol first order. While reducer pipeline placed behind the elbow, the length of mixed oil was longer and the average volume fractions of crossing sections along every axial were unevenly distributed under the petrol first order. Therefore for the reducing of mixed volume, it was appropriate for placing reducer pipeline in front of the elbow and taking the diesel oil first order when batch transportation pipeline was passing through the crossing point.
Related Articles | Metrics

The Influence of the Distribution of Hot Oil Fluid State in the  Pipeline under Different Soil Temperature Field
LI Xiaoyue， LIU Dejun， WANG Fu， MA Yan， GAO Zhao
2013, 33 (4): 41-44.
Abstract ( ) PDF ( 1827KB ) ( ) 　　
Soil temperature field changed periodically during seasons. During the long distance hot oil pipeline operation period, the pipeline operating properties would change under different soil temperature field. When setting the outlet oil temperature, Newtonian fluid, nonnewtonian fluid length and inlet oil temperature would change with different oil temperature. By aimulating the interactive temperature field between hot oil pipeline and soil temperature field how heat transfer from oil pipeline to soil was analyzed. By setting up mathematical model the change of hot oil fluid state and inlet oil temperature under different soil temperature fields was analyzed. According to the calculation results, the piping system operation conditions to realize the whole optimization could adjusted, this could also provide theoretical basis for oil transportation scheme.
Related Articles | Metrics

Numerical Simulation of Erosion Wear in Conical Restrictor
LI Liang，SHEN Longshe， YAN Yongfei， SUN Lei
2013, 33 (4): 45-49.
Abstract ( ) PDF ( 5582KB ) ( ) 　　
In Gas injection pipeline the erosion wear of solid particle in cone throttling element was an important factor for causing failure. In this paper, made by the method of computational fluid dynamics finite volume was used for the numerical simulation of the erosion abrasion and the degree to erosion abrasion and the relationship of the shear stress with the injection volume, particle diameter and the particle content change were researched. The results showed that as the particle diameter increased, the tube wall wear relatively focused on the high speed area, the degree to the cone wear was increased. When the flow rate increased, erosion rate and shear stress were increased. And when the particle concentration increased, the quantity of the erosion abrasion was increased. So the research to the throttling element antifriction corrosion study and throttling element failure prediction would provide the theory guidance.
Related Articles | Metrics

 
Route Survey and Free Span Assessment for the Extended Service Subsea Pipelines in Bohai Bay
LI Chenggang，ZHANG Jing'an，ZHENG Hui，XIAO Zhiguo，XU Yongzhen
2013, 33 (4): 50-55.
Abstract ( ) PDF ( 2118KB ) ( ) 　　
 
Subsea pipeline is the lifeline of the offshore oil & gas field. More and more pipelines have reached their designed life with the increase of the service time. Geophysical equipment acquired the date of the free span, exposure and buried condition for the subsea pipelines. The subsea pipeline assessment system assessment the critical length and fatigue life of free span. By knowing of the condition of those lines in service, the operation risk was decreased and the safety of the subsea pipelines was increased. The support of maintenance for the owner of the subsea pipelines was also offered.
Related Articles | Metrics

 
The Analysis of Tube Leakage of Syngas Plant Waste Heat Boiler
GE Jing
2013, 33 (4): 56-59.
Abstract ( ) PDF ( 3251KB ) ( ) 　　
 
The 1503 partial waste heat boiler of Daqing Petrochemical Co. 2nd chemical plant was built in early 2008.It was installed and used in 2008 July. Removing the stress treatment was completed after construction. And the pressure tests was made on the shell and tube sides in January 31, 2008 and December 1, 2008 .And at last detection was made and the test results were qualified. The 1503 partial oxidation waste heat boiler leaked in 2011 February, and the leakage of the furnace tube was analyzed by chemical composition, metallography, mechanical properties and some analysis. And the direct cause of leakage was confirmed due to the high temperature oxidation resulting in the decline of furnace tube material change and the strength properties decrease. Through the analysis of the composition of raw material, the final confirmation of raw material composition changed, and caused the tube internal fouling, the heat could not be took away, eventually led to overheating.
Related Articles | Metrics

 
The Optimization Mode of Domestic Civil Airport Oil Supply
YANG Qingguo,SHEN Jialin,CUI Zhijian
2013, 33 (4): 60-64.
Abstract ( ) PDF ( 1135KB ) ( ) 　　
 
With the rapid development of civil aviation industry, airport oil supply mode faced new requirements and challenges. The entire process of airport oil supply was analyzed and a optimal mode was tried to build. This mode reduced the cost of production and enhanced productivity on the premise of safety.
Related Articles | Metrics

 
Method of the Lifetime Prediction for Thermo Mechanical Fatigue in NickelBased Superalloy
ZHANG Xiaoling，LIU Feng，LI Junjun
2013, 33 (4): 65-69.
Abstract ( ) PDF ( 3691KB ) ( ) 　　
 
Frequency modified method, Ostergren method, the energy method of three parameter power function and the simplified energy method were chosen to predict TMF life in three nickelbase superalloys. And the prediction ability of them was assessed. The results indicat that the above methods could predict the TMF life of three nickelbase superalloys at some extent. The simplified energy method among the method was the best. The main damage mechanism of TMF was partly similar to isothermal fatigue. According to quantitative evaluation of life prediction ability to the model, the effect of fatigue lifetime prediction on outofphase was better than inphase only when the plastic deformation was considered. What's more, the simplified energy method which was based on the law of energy conservation had the rationales. And the prediction capability of that method was better than the other methods. Therefore, it was suitable to forecast the lifetime of TMF in nickelbased superalloy.
Related Articles | Metrics

 
Corrosion Behavior of Q345 Steel in Soil Contaminated by Lead
CHEN Siyao, LI Tao, LI Quanli, SHI Yanhua, LIANG Ping
2013, 33 (4): 70-73.
Abstract ( ) PDF ( 4075KB ) ( ) 　　
 
The lab simulation test of corrosion behavior of Q345 steel in soil contaminated by lead was investigated as time proceeds. The corrosion morphology, corrosion products, chargetransfer resistance and electric current density of Q345 steel were studied by SEM, XRD and electrochemical measurement technology. The experimental results showed that local corrosion and corrosion pits occur at the initial stage, and then with the increase of immersion time, the corrosion forms turn to general corrosion and pitting corrosion. At the initial stage, it could form homogeneous corrosion product film in the sample surface, which had protection effect for matrix, but with the immersion time increases, the corrosion film thicken and fall off. The electrochemical measurement technology research showed that the chargetransfer resistance increased with the time, but decreased suddenly three weeks later and the protective capability of film got weak.
Related Articles | Metrics

 
Design and Performance Analysis of ZJ40/2250DB Oil Drilling Rig
WANG Weiyan
2013, 33 (4): 74-78.
Abstract ( ) PDF ( 1133KB ) ( ) 　　
 
ZJ40/2250DB oil rig is a kind of advanced electric drilling rig. It can be used for the exploration and development of oil and gas wells, and it is applicable to 2 500～4 000 m depth operation. The rig has superior performance in meeting the requirements of petroleum drilling technology. Mechanicaldriven drilling rigs and DC drive drilling rig beyond compare.
Related Articles | Metrics

 
The Systematic Evaluation of Secure City based on GIS
YI Hao, TIAN Qiang, CUI Wei
2013, 33 (4): 79-82.
Abstract ( ) PDF ( 2735KB ) ( ) 　　
 
Constructing the safety and security city is another innovation of safety control in the last three years. It needs comprehensive and systematic effort to construct the safety and security city. There are a number of large and mediumsized cities which have carried out the plan. In this paper, a preliminary exploration for the meaning and contents of the safety and security city, urban safety planning method, and the index system of safety and security city was conducted, and the composition of the index system of safety and security of urban safety plan and the main index calculation method was focused. The results had the important significance to the construction of safety and security city, scientific evaluation of city security state.
Related Articles | Metrics

 
Weight Training Algorithm of BP Neural Network Based on Iterative Learning
ZHOU Xiaoyong, ZHAI Chunyan, LI Shuchen, SU Chengli
2013, 33 (4): 83-86.
Abstract ( ) PDF ( 1396KB ) ( ) 　　
 
A weight training algorithm of neural network based on iterative learning was proposed for the shortcoming of traditional BP algorithm, such as slow convergence and easily trapped into local minimal. The algorithm combined the principle of iterative learning with neural network, and it made use of the current and the previous training error to correct the neural network weights. It improved the speed of neural network training. Simulation results show the effectiveness of the algorithm.
Related Articles | Metrics

 
The Adaptive Method of Image Control Menu Based on ACAD
LAN Xiaomin, WANG Shengzhi
2013, 33 (4): 87-90.
Abstract ( ) PDF ( 1753KB ) ( ) 　　
 
The problems of screen resolution affecting the image size about the image control menu for the secondary development of AutoCAD were analyzed. The factors related to the size of the image control menu were found, and a method of adaptive screen resolution by image control menu was put forward. By writing the VisualLISP program, the image control menu size could automatically be adjusted according to the screen resolution, and the problems of the image control menu for the secondary development of AutoCAD were solved.
Related Articles | Metrics

 
Parameter Optimization of Wavelet Network based on the Improved QPSO Algorithm
WENG Hebiao，HOU Ligang，SU Chengli
2013, 33 (4): 91-94.
Abstract ( ) PDF ( 1342KB ) ( ) 　　
 
In the process of traditional wavelet network for parameter optimization, the gradient descent method is easily to produce the local optimum. To solve this problem, an improved quantum behavior of QPSO algorithm was proposed. In the proposed method, a weighted coefficient was added to improve the global and local search and convergence speed of PSO. When the evolution became premature, particle swarm began to mutate in this dimension. The reinitialized position of the particles in the dimension reuniformly was distributed in the feasible region for improving search accuracy. The simulation results show that the improved QPSO algorithm outperformed in the searching ability than conventional network training method.
Related Articles | Metrics

 
Design and Implementation of the 3D Virtual Campus System
YU Fei, JI Yubo
2013, 33 (4): 95-98.
Abstract ( ) PDF ( 4723KB ) ( ) 　　
 
A virtual campus roaming system is established base on the Fushun University. Two kinds of key technologies are Focused on, one is the methods of 3D modeling and optimization based on architectural working drawing, the other is the dynamic interaction between the user and the virtual environment on campus. The virtual campus is d eveloped in AutoCAD and 3DS MAX. The final virtual campus system provides roaming and collision detection function independently through the Virtools. The virtual campus has been carried out now and is of good effect．
Related Articles | Metrics

 
A New Aggregated Method for Interval Multi Attribute Group Decision
ZHENG Guiling, SUN Liang, QI Xiaoyan, ZHANG Lina, YE Tianyu
2013, 33 (4): 99-104.
Abstract ( ) PDF ( 1802KB ) ( ) 　　
Because of complexity, many aggregated methods for interval multiattribute group decision are difficult to general decision makers, a new way has been proposed in this paper. This method puts forward basic interval conception to aggregation and provides direct solution schematically. It is easier and more intuitive. Finally, as compared with the results of literature method, this has been demonstrated as an effective method.
Related Articles | Metrics

 
Evaluation of Integrated Development Ability about Each Region of Our Country Based on Cluster Analysis
WANG Mingzhu,WANG Lihua
2013, 33 (4): 105-108.
Abstract ( ) PDF ( 1134KB ) ( ) 　　
 
The cluster analysis method was used in this paper to analyze the comprehensive development ability of 31 provinces, cities and autonomous regions of China by the means of integrated classification ,from the economic development ability, employment and wages, fiscal revenue, urban construction level, the development of science and technology level, education level and social security level seven aspects. The comprehensive development ability of each region was divided into four major categories based on the differences of resource allocation and the ways of implementing policies. The research results show that there were significant differences between one another ,this difference reflected the present situation of uncoordinated development based on integrated developing ability of each region of our country. Accordingly, the countermeasures and suggestions for the steady and rapid developing synchronously throughout the whole regions were put forward.
Related Articles | Metrics

 
Numerical Simulation of Cyclic Steam Stimulation Production Mechanisms and Orthogonal Test Analysis
WEI Chaoping
2013, 33 (4): 109-112.
Abstract ( ) PDF ( 1384KB ) ( ) 　　
 
Cyclic steam stimulation(CSS) is currently the most common production method in heavy oil reservoir. Its main mechanisms are formation elastic energydriven, crude oil viscosity reduction by heating, improvement of oilwater relative permeability, liquid thermal expansion and plug removal of near wellbore area. But the contribution of the mechanisms of cyclic steam stimulation is rarely discussed. By using reservoir simulation software and orthogonal test analysis, how to realize CSS simulation was described by the current popular thermal recovery numerical simulation software, and showed that the importance sequence of these five kinds mechanisms contribution on CSS recovery was as follows: formation elastic energy, crude oil viscosity reduction by heating, plug removal of near wellbore area, liquid thermal viscosity and improvement of oilwater relative permeability. And the previous two played a decisive role, which were the high recovery guarantee of CSS. Research findings could guide designers to efficiently design CSS in heavy oil reservoirs and to use simulation software for CSS.
Related Articles | Metrics