Papers by Keyword: Reactor

Abstract: This article shows the dependence of high frequency torch (HFT) plasmatron parameters on external mode settings. The optimal operation of the plasma stand is achieved experimentally; the numerical characteristics of this mode are calculated. Based on the burning indicators of the combustible waste percentage, the possibility of using plasma stand for disposal of these wastes was concluded.

Abstract: We present long-term treatment outcomes of 201 patients with breast carcinoma who received a radical course of radiation therapy as a component of multimodality treatment. Ninety five of them received mixed photon-neutron therapy (the study group), and 106 patients received photon therapy (control group). All patients had stage III breast cancer. The presented data on the mixed photon-neutron therapy prove feasibility of achievement of high efficiency of treatment and satisfactory level of quality of patient’s life. This approach opens additional opportunities for expansion of a scope of neutrons in oncology.

Abstract: We present a millimeter scale reactor integrated PEM fuel cell energy source with an onboard hydrogen production reactor (realized by alkaline chemical hydride), and passive hydrogen buffering unit (realized by metal hydride) of hydrogen. A stacked system of reactor-hydrogen buffer-PEM fuel cell is demonstrated. The system is driven by the hydrolysis of the alkaline chemical hydride (NaOH+NaBH₄) in the presence of micro porous catalyst layer (platinum catalyst (Ni-Pt)). The produced hydrogen gas from the reactor is buffered through the hydrogen buffer (Palladium metal hydride) and gets distributed (due to the pressure difference) onto the anode of the PEM fuel cell. The operational behaviour of the complete system is investigated with the hydrogen produced from the alkaline chemical hydride and pure hydrogen gas. Long term voltage measurements under a defined electrical load of the alkaline chemical hydride driven system was measured. The increase in time for the hydrogen production observed in the long term voltage measurement is anticipated to the degradation of the Ni-Pt catalyst. The system is “self-buffering” in nature so any change in electrical load can be handled during system operation.

Abstract: The paper makes the simulation and analysis to the power harmonic which is produced by the AC drive device of the hot strip mill in the background of the metallurgical industry. Aiming at the line-side effects of AC-AC frequency conversion and AC-DC-AC frequency conversion control system harmonic, the paper makes the MATLAB simulation and analysis in three circumstances, such as the load parameters, the inductance value changes of transformer primary side and secondary side, and adding reactor etc., and defines the functions and value ranges of the line reactor. The simulation results can provide a design basis for the harmonic control and the power supply system when the system uses the variable frequency devices, and then improves the power supply quality of the large drag device.

Abstract: Aiming at the problems existed in the Production process of Scheelite Alkali Autoclave,The monitoring system and temperature control method for Scheelite Alkali Autoclave reactors were presented. The system use AT89S51 SCM as the core controller, monitor the temperature in the reactor and jacket belt on real-time, and then adjust the temperature by control the steam valve and the refrigerant valve with the Fuzzy-PID hybrid algorithm.The control result shows that it has good security and feasibility.

Abstract: In view of the present situation of scheelite smelting technology in China, we analyze the existing equipment and process problems,put forward the technique of mechanical enhancement of scheelite and alkali autoclave decomposition method combining with the temperature, the temperature of reaction kettle as the main object of control, the fuzzy control and PID control combined to design a two-dimensional fuzzy controller, through the MATLAB simulation results show that, the control effect, safety and feasibility of good.

Abstract: Analyzing the active power loss of reactive power compensation device under normal reactive power output status and its influence factors and metering the active power loss of the reactor in the 500kV substation and the capacitor in the 220kV substation, concluding that the active power meter had the influencing factors of forward and reverse active and putting forward the assessment requirements for the running reactive power compensation device by analyzing the site calibration data of metering device.

Abstract: Preliminary results of 150mm SiC 4H 4°off have been obtained with the new 150mm automatic horizontal hot wall reactor PE1O6, using chlorinated chemistry (SiHCl₃ + C₂H₄). A new injection system has been tested in two configurations and results will be shown in this paper. AFM surface roughness measurements and epi defect density have been reported.

Abstract: A SiC dry etching reactor using chlorine trifluoride (ClF₃) gas was designed and evaluated with the help of numerical calculations and experimental results. The etching rate was about 16 μm/min when the ClF₃ gas concentration, the total flow rate and the SiC substrate temperature were 90%, 0.3 slm and 500 °C, respectively. The gas stream above the substrate surface was concluded to significantly affect the etching rate profile.

Abstract: In this paper, through understanding, analyzing and comparing of domestic and foreign treatment of high concentration organic wastewater, then derived organic wastewater can be economical and efficient handled by micro-electrolysis. But at the same time, the traditional micro-electrolysis also has some disadvantages. This paper discusses a new micro-electrolysis technology, namely cavitation-impinging stream electrolysis technology which has the advantages in treating high concentration organic wastewater. It is not only solving the process of passivation and harden problems in high concentration organic wastewater by traditional micro-electrolysis technology, but also combining with the characteristics of impinging stream coupled cavitation enhancement more effectively, making the degradation of organic pollutants maximize.