Gasoline are blended with condensate oil as base oil, the gasoline obtained under the optimum blending conditions can meet the requirements of GB III standard gasoline. The relations between the quality factor of blending oil and the proportion of additives were simulated by Matlab through the experimental data. The results indicate that the octane number and vapor pressure have good multilinear correlationship with the proportion of additives.
The effect of soaking temperature and stirring rate on the corrosion behavior of Q235 and Q345 steel in simulated seawater environment (3.5%NaCl) was investigated by using soaking experiment. The surface morphology and chemical composition of corrosion products were analyzed by means of SEM and EDS. The results show that the corrosion rate of Q235 and Q345 steel has little difference and increase with increasing temperature in static seawater environment, reaching approximately 0.28 mm/a at 40 ℃. The stirring rate has a significant effect on the corrosion behavior of Q235 and Q345 steel and the corrosion rate accelerates with increasing stirring rate. When stirring rate is 300 r/min, the corrosion rate reaches 1 mm/a that is about 3.5 times as big as temperature effect. Uniform corrosion was observed on Q235 steel in simulated seawater. But the local corrosion morphology is found on Q345 steel and the main corrosion product is iron oxides. The application of Q345 material should be cautious compared with Q235 material in the same seawater environment.
Because of inherent characters of rubber materials, there exists some differences on antiswelling property of rubber materials in gasoline with different methanol volume fraction. Immersion tests in gasoline 93# or gasoline with different methanol proportions are conducted to show the antiswelling property of 3 rubber materials commonly used in motor vehicles. The results show that silicone rubber has better antiswelling property in gasoline with high methanol proportion; on the contrary, fluorine rubber has good resistance to swelling in low proportionmethanol gasoline; Nitrile Rubber has good antiswelling property in all gasoline with different proportion of methanol.
Vanadium complexes modified mesoporous molecular catalysts were prepared by impregnation and hydrothermal method respectively, and then characterized by XRD，N2 adsorptiondesorption(BET) and FTIR techniques. The results show that both the catalyst samples with impregnation and hydrothermal methods kept mesoporous structure well and vanadium oxide were dispersed uniformly in mesoporous materials. The catalytic performance was evaluated by the oxidation styrene to benzaldehyde, and found that the conversion can reach 76.3%, and selectively to benzaldehyde is 86.7% under optimum conditions.
The silane coupling agent KH570 was used for modifying the surface of calcium carbonate whisker. The optimal conditions of experiment were determined by activation degree and sedimentation volume. The results indicate that the optimum modification conditions are as follows: initial slurry concentration 10%, reaction temperature 80 ℃, coupling agent 2.5% and modification time 1.5 h.
The influence of emulsification parameters including HLB value，dosage of emulsifiers, reaction temperature, stirring speed and emulsification time on particle size of oxidized wax emulsion was studied by laser particle analyzer. The results show that optimum emulsification conditions are as follows: dosage of complex emulsifiers 3.0%, the HLB value 12, reaction temperature 85 ℃,stirring speed 800 r/min, emulsification time 35 min. Under above conditions, the minimum particle size of the oxidized wax can reach 66.2 nm.
Adsorption removal of basic nitrogen compounds in the shale diesel with USY molecular sieves was investigated. The effect of adsorption time, temperature and adsorbent/oil weight ratio on the nitrogen removal rate was studied, and found that highest nitrogen removal rate (30.73%) are obtained under the following conditions: the adsorbent to oil weight ratio of 0.03, the adsorption temperature of 120 ℃, the adsorption time of 30 min. Simultaneously, the static equilibrium adsorption capacity can reach 27.2 mg/g. After regenerated for several cycles, the removal rate of basic nitrogen compounds is still more than 25%. Adsorption kinetics suggested that adsorption denitrogenation follows the second-order equation.
Metal organic frameworks Co1Cu2(BHTC)2 was prepared from biphenyl3,4',5tricarboxylate as organic ligand with hydrothermal method, and then characterized by XRD, SEM, TEM, TGA and FT-IR technology. The effect of temperature and crystallization time on the crystal growth and the growth mechanism of Co1Cu2(BHTC)2 was studied by SEM method. This work provides a new way of the crystal growth of nanoporous material. The results indicate that the crystal morphology changes markedly with the increase of crystallized time. The small hexagonal secondary building units (SBUs) were assembled by sharing the same prism of the tiny crystals, and then aggregated into a bulk hexagonal plate-like crystal.
Bulk NiAl2O3 catalysts was synthesized in the way of supersolubilization nanometer selfassembly. The bulk NiAl2O3 catalyst was characterized by Xray diffraction (XRD) and the mercury porosimeter. The influence of affecting factors on physical properties of catalysts was investigated, such as the amount of urea and surfactant, and the amount of nikel oxide. The results show that bulk NiAl2O3 catalysts has a better bore structure, which is made from based amount plus 2 of surfactants, based amount plus 5 of urea and plus 3 of NiO. Specific area of the bulk NiAl2O3 catalyst is between 186 m2/g to 324 m2/g, bore diameter is 3~12 nm, and the diameter of bore is even and distribute concentration, witch is belong to medium and big bore scope, the bore permits is 0.45~0.89 mL/g. This bulk catalyst is a more ideal bulk catalyst which can satisfy the request of hydrogenation. This synthesize method has more merits,such as decreasing the dosage of surfactant and aqueous, operation craft simple, reaction can be controlled easily.Nanometer bulk catalyst has a good application value in industrialize production because of its better property than the residue oil hydrogenation catalyst.
Aiming at the mixed oil quantity of pipelining products, mixed oil control equations of batch transportation was established based on multiphase flow model and finite volume method. The transportation mediums were 0# diesel and 90# gasoline. The numerical calculation was based on two cases, the product flows through a Ztube from top to bottom and from bottom to top. The research shows that when it flowed through the horizontal section of a Ztube, the distribution of mixed oil is not symmetric. In a vertical section, there are lager amount of mixed oil when diesel is above gasoline and the distribution of section concentration was more uniform when gasoline is in front of diesel.
Aiming at the actual situation of the buried sulfur natural gas pipeline leakage problem, with the finite volume method, the numerical simulation for volume fraction of hydrogen sulfide and methane of the buried sulfur natural gas pipeline continuous leakage were preceded. The upper soil was considered as porous medium to gas diffusion effects. Comparing and analyzing the dangerous area of methane and hydrogen sulfide occurring at the moment, the results show that the virulent area of hydrogen sulfide leaked is much greater than the dangerous area of methane, covering completely. Between the common area of hydrogen sulfide and methane, fire prevention measures are took as well as poisonous protection measures in the area of hydrogen sulfide influenced alone.
The power plant boiler high temperature slag is typically the use of recycled water for cooling the slag, and recycled water slag wasted heat into the cooling tower and the atmosphere. Not only the heat of the slag has not been fully utilized, but also the boiler thermal efficiency and recycled water evaporation were caused by the waste of water resources to a certain extent, and by thermal pollution on the environment. It is very important that Boiler high temperature slag wasted heat recovery for energy conservation, and improved the overall boiler thermal efficiency. The design of the works of three waste heat recovery scheme, the effect of energy saving and economic benefits of each program optimization calculation resulted in cold slag recycling power plant boiler and high temperature slag wasting heat for heating boiler feed water, the cold residue machine released hot water into the low temperature heater between 7# and 8#, there are very significant results and thus reduce the turbine extraction, reduce the turbine power heat rate, and improve the efficiency of the entire power plant power generation. Its findings can be generalized to other power plant boilers and lowtemperature waste heat recycling.
n order to more accurately determine the crude oil batching transportation temperature fluctuation, the soil temperature field around pipeline insulation surface drift was studied. For variation characteristics of soil temperature field around underground pipeline in the process of batching transportation of cold and hot crude oil, the non steady heat transfer model was established, and soil temperature field in different period of batching cycles and moments was numerically simulated and analyzed by using CFD software in the process of crude oil batching transportation. The results show that the drift on the thermal insulation surface of soil temperature field has certain regularity, and adiabatic surface with crude oil batching transportation time shows periodic drift, drift period and period of batching cycles of cold and hot oil transportation were the same; drift cycle of thermal insulation surface of soil temperature field and the scope are related to cold and hot cycle on the batch transportation of oil.
The wasting of the superheated steam or heating the oil reservoir not sufficiently might be caused by the uncertainty of steam injection period during the steam soak, therefore, and a two-dimensional, unsteady state mineshaft-stratum-oil reservoir mathematical model was established, and the temperature fields of the stratum and the oil reservoir were analyzed. Furthermore, the influences of steam injection period to the heat affected radius during the steam soak were discussed. The results show that the heat affected radius of the oil reservoir increases with steam injection period duration and reaches the maximum when the steaming for 5 d, then nearly no longer changed after that. The heat in the oil reservoir began to transfer to the stratum when the steaming for 3 d, and the temperature fields of the stratum and the oil reservoir are nearly the same for 6 d. The steam injection period should be controlled in 4~5 d during the steam soak.
Considering the large resource of low temperature waste heat in heavy reservoir thermal recovery process, the technology of recover waste heat in oil field was used for heating pipeline in heavy oil transportation. The model of dynamic simulation system of the technology was established by MatlabSimulink, and the heating efficiency of the technology system was obtained. The results of the study show that the heating temperature of system can achieve 75 ℃, satisfied with the temperature requirements of heating water in heavy oil transportation, and the heating coefficient of system is 3.5. Based on this, through the analysis of the energy that the established system model can save standard coal 17 t/a better than boiler heating model, to reduce the discharge of pollutants in the air 0.714 t/a, the system has a large economic and environmental benefits.
The iterative formula of the cold layer economic thickness was deducted , and the formula can quickly and easily calculate the economic thickness of the layer of cold. The analyses and designs were used by examples, and in the calculation process, the economic thickness of the layer of cold drawn after comparison, so as to achieve the purpose of energy conservation. This method is not only simple and easy to understand, but also greatly improve design efficiency and quality.
Based on the traditional electronic commerce recommendation system, these technology means such as distributed computing, publish/subscribe based on the semantic，and ontology were introduced. The personalized electronic commerce recommendation model architecture was designed. The film areas ontology was constructed, which was implemented by Protégé 3.3.1 ontology model tool. The architecture core algorithms were described in detail, which are the clustering algorithm of users characteristics and the match algorithm of publish/subscribe based on the semantic. The experimental results show that the personalized recommendation system based on publish/subscribe has a good recommendation accuracy.
Milling head is the important actuator of divided milling machine. The strength value of milling machine has big affection in reliability when it working. Thus, the static and modal analysis used finite element software ANSYS has important meanings. The geometric model of milling head was builded by 3D software Pro/E and tested the interference of the model. The finite element was constructed through the connector of Pro/E and ANSYS and made modal and static analysis through ANSYS. The results of dynamic simulation show that there is no interference produced. The results of modal analysis show that there is no resonance phenomenon produced. At the same time, the results of static analysis show that the stiffness and strength is satisfied. Theoretically, the results of software provide references for the structure and optimizing design of the machine.
The Drilling machine is a modern coal mining technology and equipment of minecoaling.When Drilling machine work properly, the power feed part is under the complicated forces, and the working environment is harsh. In order to ensure product quality and reliability, using finite element analysis software ANSYS dedicated feed module the stress and vibration modes of calculation. By calculating the results obtained ZDY2000L rig feed module in a state of extreme working stress distribution and rail stiffness and deformation values and found that the design of the product in the case of reducing the amount of steel, while ensuring the strength of the structure of local requirements and overall stiffness deformation requirements. Structure necessary vibration modal analysis of the natural frequencies has been submitted so as to provide a theoretical basis for improving the mechanical properties of the system.
In the finite element ANSYS software established simplified structure model, simplified the structure into axisymmetric model, alternated the structure size. Using order flow to compute stress intensity factor around the singularity, then analysed the relation between the stress intensity factor and the structure size and compared to the calculation by Jintegral. The results show that the application of J integral calculation KⅠ has feasibility.
The grid of the quickopening clamp structure on the pressure sintering furnace was meshed by utilizing HyperMesh software, and the nonlinear contact analysis for the quickopening structure was achieved by ANSYS contact element, then the third strength equivalent stress and deformation of the quickopening structure under the designed pressure were obtained. The analyses of the furnace lid, body and clamp were accomplished. The stress intensity on the dangerous crosssection was evaluated according to JB4732—1995 [WTBX]Steel pressure vessels——analyze design standard[WTBZ]. The analysis results indicate that the intensity requirement is satisfied.
A financial performance evaluation index system was constructed on listed companies in Liaoning Province by SPSS17.0 software and factor analysis method, and have a comprehensive evaluation and ranking for these listed companies. Understanding the financial performance of the listed companies in Liaoning province, and drawing the conclusion of each listed companies’ comprehensive rankings by analyzing the financial index can provide strong not only support for managers and investors to make decisions, but also improve the comprehensive competitiveness of the company. It fosters Liaoning Province’s economy sustained and healthy development, and play an important role in our country's economic development.
Several upper triangular matrix rings of clean rings were studied. By the definition of a clean ring (with 1) is extended to any ring (not necessarily with 1)，some results were proved: Let R be a clean ring, and let G be a group of order 2, then group ring RG is also a clean ring under some conditions. Several upper triangular matrix rings are strongly clean rings.Then several results of clean rings were extended; some upper triangular matrix rings are a strongly fclean rings.
