Jan Mikula

Advanced process manipulation of magnesia sintering

Manipulation process is connecting of our macroscopic world to the microscopic or nanoscopic one. Manipulation can occur in a variety of ways. Outside manipulation take control over the process by external forces. Inside process manipulation is becoming a part of the process. This process manipulation is called advanced process manipulation (APM). Possibility of process manipulation may substantially enhance the process effectiveness. In this paper methods of advanced process manipulation are presented. An incremental manipulation process will be defined as a sequence of basic operations. Process manipulation generally requires custom-built system capable of performing of manipulation procedures. The progress in manipulation techniques can extend the application of the manipulated system. We have developed a simulation based system which was successfully implemented for designing of APM systems and control process in ways that are not conventionally possible. The developed system was applied on magnesia sintering process in shaft and rotary furnaces.

Surrogate Modelling of Processes for Granular Material Thermal Treatment

Abstract Present advanced technologies creates increasingly complex engineering systems and the complexity of their engineering analysis advance at the same rate. In addition, the design and operation of complex engineering systems involves the integration of multiple disciplines and the resolution of conflicting objectives. Traditional parametric approach is inadequate to analyze these large-scale systems because of its computational inefficiency. Approximation techniques may be applied to build computationally inexpensive surrogate models for large-scale systems to replace expensive-to-run computer analysis codes. Numbers of approaches are existing. Response surface models are frequently utilized to construct surrogate approximations; however, they may be inefficient for systems having with a large number of variables. An alternative approach based on conceptual modelling for creating surrogate models is presented. A unified model for thermal processes is developed to compute thermal treatment of granular materials. The model does not require measurements but they can be useful for the model adjustment on specific situations or on its validation. A Databased modelling approach is used in order to keep at a minimum all the a priori assumptions on the physical mechanism driving the process formations. The motivation is to reduce computational expanse associated with use of simulation models needed to find good solutions. The model has been applied to replace of computationally expensive computer analyses.

THREE-STAGE FURNACE FOR BIOMASS THERMAL TREATMENT

Acidified and non acidified samples of wastewaters from the Etoudi’s slaughterhouse (Yaounde, Cameroon) were analyzed before and after having been exposed to an electric discharge in a cold plasma reactor at different exposure times. Analyses reveal that untreated and non acidified wastewaters (pH = 7.8) contain 230.4 mgL-1 of phosphate (PO4 3-) and 479.6 mgL-1 of nitrate (NO3 -) ions. Exposure of these wastewaters to the gliding discharge (“glidarc”) operated in humid air induces PO4 3- and NO3 - concentrations abatement by 41.55% for phosphates and 86.24% for nitrates within 20 min of exposure for a gas flow rate of 800 Lh-1,which confirms the efficiency of the glidarc treatment in humid air in case of waste treatments. On the other hand, exposure of acidified wastewaters (pH = 2.2) to the glidarc in the same conditions showed that PO4 3- andNO3 - concentrations increase with exposure time; this result is in conformity with oxidation phenomena induced by the glidarc and previously presented by several authors. From these results the efficiency of the “glidarc” technique in degrading phosphates and nitrates in basic medium was proven.

SIMULATION ANALYSIS OF PREHEATER CHARGE TO THE ROTARY FURNACE

Mathematical modeling of heat aggregates is one of the fundamental methods of the mathematical modelling research. A mathematical model based on the method of elementary balances was created for the thermal treatment of granular and lumpy materials. The adaptation of the selected aggregate model is based on prior knowledge and experiments. The paper presents an adaptation of the mathematical model for the magnesite processing rotary furnace using the mode of caustic and clinker production. A simulation of the charge preheater impact based on the thin layer principle is implemented into the model. The main advantages of using this type of preheater of rotary furnace are smaller dimensions for a large exchange surface and low pressure losses.

MICROFLUID APPARATUS FOR FINE GRANULAR MATERIALS THERMAL TREATMENT

Innovation is the application of new knowledge and its materialization. Thus it ensures the companys ability to cope with changes in the business environment and the ability to survive in the global competitive environment. As a result, innovation saves natural resources, provides safe and more efficient transport and production. Innovations change the style of work life, place emphasis on the importance of education, creativity, communication and collaboration. However, innovations are associated with a number of problems. They require high costs of the research and development and they face the risks during implementation. This paper describes specific experience with the application of principles and tools of logistics, project management and mainly the application of management system created for the streamlining not only the process of preparation and implementation of the specific innovation project, but also for the streamlining the operation of research and development workplace which implement innovative projects.