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Xu L.,University Of Science And Technology Liaoning | Su Y.,ACRE Coking and Refractory Engineering Consulting Corporation
2016 IEEE International Conference on Mechatronics and Automation, IEEE ICMA 2016 | Year: 2016

In order to increase the production of coke for steel enterprises, new 6.25m stamp charging coke oven is developed. In this paper, the electric control schematic of new type coke oven dedusting station is improved and optimized accordingly to achieve the purpose of reducing the industrial investment. The optimization shall focus on four points of dedusting station, which are variable frequency drive room, motor control center room location, control diagram of electrical equipment on lower part of bag house and control diagram of electrical equipment on upper part of bag house. Optimization design of electric control system when compared with 5.5m stamp charging coke oven dedusting station shall be introduced. © 2016 IEEE.


He W.,Zhejiang University | Xu G.,Zhejiang University | Rong Z.,Shanghai Key Laboratory of Spacecraft Mechanism | Li G.,ACRE Coking and Refractory Engineering Consulting Corporation | Liu M.,Hangzhou Electric Power
Metrology and Measurement Systems | Year: 2014

Considering the low efficiency during the process of traditional calibration for digital-display vibrometers, an automatic calibration system for vibrometers based on machine vision is developed. First, an automatic vibration control system is established on the basis of a personal computer, and the output of a vibration exciter on which a digital-display vibrometer to be calibrated is installed, is automatically adjusted to vibrate at a preset vibration level and a preset frequency. Then the display of the vibrometer is captured by a digital camera and identified by means of image recognition. According to the vibration level of the exciter measured by a laser interferometer and the recognized display of the vibrometer, the properties of the vibrometer are calculated and output by the computer. Image recognition algorithms for the display of the vibrometer with a high recognition rate are presented, and the recognition for vibrating digits and alternating digits is especially analyzed in detail. Experimental results on the built-up system show that the prposed image recognition methods are very effective and the system could liberate operators from boring and intense calibration work for digital-display vibrometers. © 2014 Polish Academy of Sciences. All rights reserved.


Yu S.,Jilin University | Qu P.,ACRE Coking and Refractory Engineering Consulting Corporation | Liu Y.,Jilin University
Proceedings - 2014 International Conference on Mechatronics and Control, ICMC 2014 | Year: 2014

In this paper the schemes to compute robust control invariant sets for linear (uncertain) systems are collected, which are not necessary minimal robust control invariant sets. Firstly, the concept of logarithmic norm is resorted to a simply differential functional inequality. Feedback control laws are obtained for both of the two schemes. In the scheme based on the differential functional inequality, the obtained robust control invariant set is a level set of the storage function. © 2014 IEEE.


Men X.-X.,Northeastern University China | Tang C.-A.,Dalian University of Technology | Han Z.-H.,ACRE Coking and Refractory Engineering Consulting Corporation | Ma T.-H.,Dalian University of Technology
Dongbei Daxue Xuebao/Journal of Northeastern University | Year: 2013

Hydraulic fracturing process of the heterogeneity rockmass under different perforation angles was simulated using the RFPA2D2.0-Flow. Considering the heterogeneous characteristics of rock in a meso-scale, a seepage-stress-failure coupling model was created based on the finite element calculation method. The simulation results show that the maximum principal stress controls the fracture propagation direction no matter how perforation angle changes. With the increase of the perforation angle, a turning fracture becomes more obvious and the turning distance bigger. The best perforation angle area is from 0° to 30°. The numerically simulated results were in agreement with the experimental results.


Men X.X.,Northeastern University China | Tang C.A.,Dalian University of Technology | Han Z.H.,ACRE Coking And Refractory Engineering Consulting Corporation
Applied Mechanics and Materials | Year: 2014

Hydraulic fracturing process in fractured rockmass which with an existing single natural fracture at its various conditions: its different angles and different lengths was simulated by using RFPA2D(2.0)-Flow version which adopts the finite element method and considers the heterogeneous characteristics of rock in meso-scale, creates seepage-stress-failure coupling model. The effect tendency of natural fracture's angle and length on the seepage characteristics of fractured rockmass was given through the description of tensile fracture initiation and propagation in the rock specimens. The simulation results show that the effect of these two factors on fractures initiation, propagation and rockmass stability under the hydraulic fracturing could be remarkable. © (2014) Trans Tech Publications, Switzerland.


Jiang D.-Y.,ACRE Coking and Refractory Engineering Consulting Corporation | Dong H.-G.,Dalian University of Technology
AIChE Annual Meeting, Conference Proceedings | Year: 2012

A two-dimensional model, which focuses on fluid flow, heat-mass transfer, and reaction kinetics both in axial and radial directions, is developed to represent a practical reactor. And the basic model is employed to construct a state-space framework for reactor network synthesis. Total Annual Cost (TAC) as an objective is considered to describe the performance of reactor system.


Jin K.,University of Science and Technology Beijing | Feng Y.,University of Science and Technology Beijing | Zhang X.,University of Science and Technology Beijing | Lin W.,University of Science and Technology Beijing | And 3 more authors.
Huagong Xuebao/CIESC Journal | Year: 2012

To describe fluid flow, combustion and heat transfer in coke oven, a three-dimensional transient mathematical model with coupled coking and combustion chambers was developed and solved numerically. The calculated central temperature of the coke was compared with measured data. Three different evaporation models were compared. Effects of operational factors such as temperature, moisture content and density of charging coal were investigated. It is shown that the proposed model is suitable for describing thermal processes in the coke oven. It reveals whether the temperature distribution is uniform along the height of the chambers with coking evolution. Some measures may be used to improve the production efficiency, such as preheat, adjustment of moisture content, and densification for charging coal. This work is theoretically valuable for the operation of coke oven. © All Rights Reserved.


Zhang A.Q.,University of Science and Technology Beijing | Feng Y.H.,University of Science and Technology Beijing | Zhang X.X.,University of Science and Technology Beijing | Wang M.D.,ACRE Coking and Refractory Engineering Consulting Corporation | And 2 more authors.
ISIJ International | Year: 2013

Three-dimensional mathematical model describing simultaneous combustion, fluid flow, heat and mass transfer were established in coupled combustion and coking chambers of a coke oven. Since coupling numerical simulation was time-consuming and hard to get convergence, two kinds of decoupling methods were proposed and performed to simplify the simulation and improve the calculation efficiency. The parallel decoupling method separates the coupled transport phenomena into two independent processes existing in combustion and coking chambers, respectively, with necessary heat flux boundary condition. While the serial decoupling method is, first calculating the steady heat transfer with combustion and fluid flow in combustion chamber, and then using the obtained results as inputs to simulate the unsteady heat transfer from combustion chamber to coking chamber via the inter-wall. As far as the temperature evolution in coking chamber was concerned, these two decoupling numerical methods could supply alternative and efficient ways for numerical simulation of transport phenomena in coupled chambers of a coke oven. It is expected that this work is helpful for decoupling simulations of other similar complicated thermal transport processes in coupled geometry. © 2013 ISIJ.


Jin K.,University of Science and Technology Beijing | Feng Y.,University of Science and Technology Beijing | Zhang X.,University of Science and Technology Beijing | Wang M.,ACRE Coking and Refractory Engineering Consulting Corporation | And 2 more authors.
Applied Thermal Engineering | Year: 2013

A three-dimensional transient mathematical model was developed for coupled coking chamber and staging combustion chamber in large-capacity coke ovens, to describe the flow-combustion-thermo behavior. The model was solved numerically using CFX CFD package and was validated by the central temperature evolution of coke bed. The fields of temperature, fluid flow and combustible gas concentration were analyzed, with special reference to the temperature difference of coke bed and NO concentration of exhaust. The results show that staging combustion plays an important role in improving temperature uniformity of the coke bed and reducing NO concentration of exhaust, especially for the large-capacity coke oven. It is beneficial for production optimization to decrease the gas mass flow rate at the bottom inlet while increase the rate at the upper inlet in the combustion chamber. In addition, it turns out that some measures such as coal preheating, adjustment of moisture content or/and coal densification may be used to improve the coke production efficiency. It is expected the developed model and relevant data in the present research will be beneficial to realize large-scale coke oven with a higher energy efficiency and lower emission. © 2013 Elsevier Ltd. All rights reserved.


Liu J.,Acre Coking and Refractory Engineering Consulting Corporation | Wei T.,Acre Coking and Refractory Engineering Consulting Corporation
Naihuo Cailiao/Refractories | Year: 2013

China's refractory equipment including mechanical equipment and kilns developed rapidly in the past two decades by technological innovation, advanced products introduction and independent research and development based on the former Soviet Union's aid. In recent years, some high efficient equipment was developed covering fields of fine grinding, burdening, mixing, shaping and firing, etc. In the new developing period of refractory industry from big to strong, the advanced refractory equipment shall be well researched and developed, and be well spread taking the opportunity of raw materials homogenization and purification, capacity large scale, quality improvement, energy saving and pollutants reduction.

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