Rui Tian

Researching into Microbial-Limestone new wet flue gas desulfurization method

It is summarized the research hotspots of flue gas desulfurization (FGD) and analyzed the advantages and disadvantages of Limestone-Gypsum wet flue gas desulfurization (WFGD) and microbic desulfurization methods. Put forward a new idea of combining the Limestone-Gypsum WFGD, microbial method with catalytic oxidation of transition metal (Fe3+/Fe2+ galvanic couple) reasonably. Then established the model of the new type method and analyzed the mechanism and feasibility deeply, promoted the development of FGD technic.

Researching on Left-Turning Traffic Organization and Control at Urban Signalized Intersections

Left-turning traffic is a critical and influential factor for urban intersection of traffic operation. As an integrated transportation hub, the railway station of Hohhot assembles so many taxis, buses and pedestrians, which result in traffic capacity reducing and conflicting. Traffic delay phenomenon is very severe. Based on the field investigation on the traffic organization and control, this paper analyzed traffic operation conditions under the present situations. Also, from the perspectives of guaranteeing safe operation of vehicles standpoint and reducing waiting delay to the minimum standpoint, the paper proposed the improving measurements for traffic management and control.

A Preliminary Analysis of Reliability on the Operation of Hohhot Hybrid Bus

This paper analyzes the bus operation condition under the cold and high altitude city such as Hohhot in Inner Mongolia. According to the exist problems for 5 kinds of move buses, 4 different brands hybrid buses and a conventional bus, the reliability of the whole bus was analyzed. It wants to find the various factors impact on the bus reliability under different conditions. Thus, the properties of the hybrid bus can be improved, the fundamental data and experience for the large-scale production has been accumulated.

Preliminary Analysis on Gas Economy of Hohhot Hybrid Bus

Hohhot is a typical high altitude and cold city. This paper combines the running condition of Hohhot bus, through contrasting the running data of the invested 200 hybrid buses and conventional bus in different running conditions, in order to find the different factors and change law which influence the gas economy of hybrid bus, and provide reference data for the further development on the new energy vehicles which is suitable for the high altitude and cold city.

Effect of Aeration Conditions on the Flow Field in the Submerged Membrane Bioreactor

A full size 3D numerical simulation of gas liquid two-phase flow in a submerged membrane bioreactor was carried out. The standard k-ε turbulence model and Euler multiphase flow model of fluent were used. The effect of changed aeration conditions in the reactor on the gas holdup and gas-liquid velocity distribution in the reactor was studied. The simulation results were shown that, at the same aeration rate, the liquid and gas velocities of 1mm hole aerated at the membrane surface increased faster than 2 mm and 3mm aeration holes; At the same aeration hole , with the increase of aeration rate，the liquid and gas velocities at the membrane surface increased; At the 1mm aeration hole and 5.5m3/h aeration rate, the vortex area was larger and gas holdup was higher, so that gas and liquid were contacting well and the membrane surface scouring effect was better; The Simulation also shown that local gas holdup was lower at close to the wall at the bottom of the reactor, this was not conducive to the growth of microorganisms in the activated sludge, the need to further optimize the structure of aeration and reactor.

Electric Heating Biogas Digester Experimental Research and Numerical Simulation of Fluent

In order to verify the correspondence of numerical simulation and experimental results in the electric heating biogas digester system, an electric heating biogas digester experimentdevice was established, and according to the experimental conditions, software Fluent was used to simulate the process of the heat transfer in the system. Before simulation, analyze theexperimental data through the calculation of heat balance and modify it, then use the modifiedexperimental data, compile UDF to characterize the dynamic boundary conditions, choosestandard turbulence model through the Raleigh number, numerical solving the process. Numericalsimulation results show: simulation process basically reflects the experiment, the simulation dataand experimental data are good agreement, and error within 1%. It is concluded that thenumerical simulation analysis is accurate, method is reliable.

Experiment Research and Mechanism Analysis on the Thermal Properties of Solar Anaerobic Digester

According to the resource characteristics of Chinas western alpine region, the thermal equilibrium experiment and analysis of solar digester is studied in this paper. Under the simulation conditions, the experiment showed that preheating time of solar digester will be shorter with the heat temperature increasing, and the shortest preheating time is 35 min. At the same time the calculation result showed the effective thermal efficiency in preheating stage is gradually increased from 75.7%, 84.6% to 99.3%. In order to maintain the digester thermostat 860 kJ/m3/h heat should be provided to the digester. The digester temperature can be maintained above 33°C within 10 hours in the case of a low humidity in summer. The auxiliary heat sources and additional insulation layer added to the system should be considered in the case of winter and high humidity day in summer.

Study on the Flow Field in Membrane Bioreactor Research by Using PIV

Membrane bioreactor flow field distribution directly affect effective control of the membrane pollution,and affect the membrane flux greatly. The experiments of membrane bioreactor liquid are measured by using PIV that the measurement areas include membrane bioreactor upper, middle and lower. The experimental data obtained velocity field information through the PIV software analysis. The experimental result indicates that middle of the membrane bioreactor flow field is the most unstable. The experimental measurement result provide membrane bioreactor structure the optimized design, effective control of membrane pollution and raise the membrane flux.

Study on the left-turns organization methods at a signalized intersection

The paper analyzed the present channeling and signal timing of the traffic organization methods by the field survey on Hohhot railway station signalized intersection, and studied traffic operational conditions under the present situations. In order to reduce control delay and queue length by left-turns generating disturb, this paper proposed protected-plus-permitted phasing left-turn operation and optimized with synchro simulation system. After optimizing, control delay and queue length are obviously lower. The same time, the paper made a suggestion on setting the facilities of pedestrians crossing the intersection.

Study on slug flow pattern in submerged membrane bioreactor

As a promising wastewater treatment technology, the submerged membrane bioreactor (SMBR) has been given extensive attention both in research and application. Membrane module is the core part of submerged membrane bioreactor and optimized design of membrane module is an important measure for controlling membrane fouling. The effect of gas-liquid two-hase flow pattern on membrane fouling was summarized in this paper basing on the design principle of gas-liquid two phase flow. The conclusions were drawn that slug flow delivers the most important impact on shear stress to membrane surface and it is the optimal flow pattern in the submerged membrane bioreactor in order to reduce membrane fouling. This paper mainly provides the basic theory for the optimization design of membrane bioreactor.