Abstract
Problem statement: This study was made to reduce energy consumption and increase productivity of drying process in many industries, to achieve the required aim, design arithmetic methods and choose the parameters of the drying machine and computing additional factors including characteristics of materials and air flow effect. Approach: The design of these types of dryers did not include the addressed factors during the design; the study of these new factors will provide better understanding of the process and increase the abilities for improvement. study made to define the engineering design procedure of a material drying plant which include the size (length, width, height) of the operating member, amplitude and vibration frequency that provide necessary productivity, efficient parameters of material and air movement, necessary drying time and to specify quantity and condition of material subjected to drying. Results: The improvement included the conveyer design which consisted of shutters; the shutter design includes size, angle of inclination and gab size. After applying primary data and the standard thermo computation, the dynamic parameters are set and then the geometric parameters. According to the mathematical computation the design was made and then the verifying of the elements of speed of material motion, air current and the wetness of material was built accordingly. The result of this study was mathematical method for defining the dimensions of drying machine to obtain optimum productivity with lowest energy consumption. These mathematical equations can solve the problem of low productivity and high power consumption if implemented correctly and taking into consideration the dynamic and geometric elements of each case. Conclusion: The results of this study can be implemented in many fields of the industry where dryers were used, the application of the mathematical relations can improve the revenue by increasing productivity and lowering power consumption for industry. For further study, the study of thermodynamics on the movement of particles will be advised.
Highlights
The process of drying extracted materials is considered one of the most important preparatory and final stages of separating raw materials process.It is known that any process involving water removing consumes less energy compared with the dry processes
The economical cost of drying processes depends on many factors such as the period of the materials presence in the drying passage, temperature degree, ratio of wetness, size of granules, the space of contact between the dryer and materials, the type of contact with a solid object or gas-dynamics[1]
It is possible to increase the efficiency of the vibrating conveyor by designing arithmetic methods, choice of the dynamic and designing parameters with computing the extra factors, related to the existence of air currents and the change of the characteristics of materials that affect the nature of moving them on the operating element at the time of drying
Summary
The process of drying extracted materials is considered one of the most important preparatory and final stages of separating raw materials process. Experience shows that using the vibrating drying machines with pumping hot air through the vibrating hot layer conceder as a high economic and efficient method for drying materials. The vibrating drying machine (Fig. 1) consists of a framework that is equipped with a compact passage (leakage resistant) and divided by the gas distribution jalousie into two parts. The upper section is attached to a feeding regulator; whereas, the lower section is attached to the gas burner equipped with pumping fan to provide hot air. It is possible to increase the efficiency of the vibrating conveyor by designing arithmetic methods, choice of the dynamic and designing parameters with computing the extra factors, related to the existence of air currents and the change of the characteristics of materials that affect the nature of moving them on the operating element at the time of drying
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