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Experimental study on FeIICit enhanced absorption of NO in (NH4)2SO3 solution
Bei Yan,Jiehong Yang,Meng Guo,Sijie Zhu,Weijing Yu,Shuangchen Ma 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
FeIICit and (NH4)2SO3 mixed solution was selected as denitrification absorbent, and enhanced absorptionof NO was studied in a bubbling reaction column. The results show that, the highest NO removalefficiency achieved under the molar ratio of FeII to Cit was 1:2, NO removal efficiency decreased slightlywith the increase of pH in the range of experimental pH, the NO removal efficiency reduced with theincrease of temperature. NO removal efficiency increased slightly with the increasing concentrations ofimport NO, but decreased with the increasing gas flow rate. Validated experiment was carried out underthe optimum conditions in the double columns, the NO removal efficiency reached up to 71.66% within1 min and 48.14% within 6 min.
Design and Performance Study of Hybrid Channel-valved Magnetorheological Dampers
Yan Li,Xiaolong Yang,Jiehong Zhu,Youming Zhou 한국자기학회 2023 Journal of Magnetics Vol.28 No.1
In order to solve the problem of low damping force caused by low utilization of magnetic field in traditional magnetorheological dampers, a hybrid channel valve type magnetorheological damper with circular channel and disk channel are proposed. The main content of this paper is to design the basic structure of mixed channel valve magnetorheological damper. The mathematical model of damping force based on Bingham plastic model was established from the design of magnetic circuits. The two-dimensional simulation model of MR Damper was established by using EMAG module in ANSYS finite element analysis software, and the magnetic circuit of mixed channel valve MR Damper was simulated and analyzed. The results show that the output damping force of the hybrid channel valve-type magnetorheological damper is 18 KN and the adjustable coefficient is 14.52 with the current I of 3A, the number of coil turns of 560, the axial damping gap of 1 mm and the radial damping gap of 1.5 mm.
Design and Numerical Study of Hybrid Magnetic Source Disc-type Magnetorheological Valve
Xiaolong Yang,Yan Li,Youming Zhou,Shiying Zhou,Jiehong Zhu 한국자기학회 2023 Journal of Magnetics Vol.28 No.2
Magnetorheological valves are important components in hydraulic systems that provide precise position control. At present, the low-pressure drop performance of magnetorheological valves is the main problem limiting their application. To improve the pressure drop performance of magnetorheological valves, a hybrid magnetic source disc magnetorheological valve is proposed. The magnetic pressure drop model and viscous pressure drop model of the hybrid magnet source disc type magnetorheological valve based on the Bingham model are Derived. Magnetic field distributions in the damping channel of the hybrid magnet source disc type magnetorheological valve are obtained by using ANSYS finite element analysis software. The mathematical model of the relationship between pressure drop and magnetic induction intensity was established using Matlab software, and the effects of parameters such as effective current, axial damping gap, radial damping gap, and coil width on the pressure drop performance of disc-type magnetorheological valves with hybrid magnetic sources were numerically analyzed. The results show that the pressure drop of the disc magnetorheological valve with a hybrid magnetic source can reach 10.9935 MPa at the current I=3A, axial damping gap ga=1 mm, and radial damping gap gr=1.5 mm. Compared with the conventional disc magnetorheological valve, the pressure drop performance of the hybrid magnetic source disc magnetorheological valve is improved by 28 %, which provides ideas on how to improve the pressure drop performance of the magnetorheological valve.