The effect of parameters on the performance efficacy of a single screw feed extruder using a design experiments and response surface methodology

Almira Kabdusheva, Ayap Kurmanov, Maxat Amantayev, Yralbay Khasenov and Vladimir Sapa

Abstract: Feed extrusion is one of the most energy consuming processes in the feed industry. Single screw extruders due to their numerous advantages are of great importance in agriculture all over the world. In order to increase in the efficacy of the feed extrusion process, it is developed the extruder screw by designing its flight edge with the grooved surface. This type of designing provides a condition for restraining the extruded material, which helps to reduce the feed leakage through the clearance between the screw flight edge and the extruder barrel wall. Hence, the aim of this research is to increase in the performance efficacy of the extruder by optimizing the operation parameters based on the study of the feed – screw element interaction. In this article are presented the results of the experimental researches being carried out in laboratory conditions using an extruder PE-20 filled with grain material to study the effect of operation parameters on the performance efficacy of the extruder. Determination of the effect of factors, namely the type of screw with different height of grooves on the flight edge, moisture content of the grain material and feed throat opening on the performance efficacy of the extruder, was done using a factorial design experiments and response surface methodology. It is revealed the optimal operation parameters, under which the maximum performance efficacy of the extruder is provided. In doing so, the performance efficacy of the extruder increases by 22-25% in comparison with the standard screw with the plain surface of the flight edge. The research results will be used in the development of a new single screw extruder.

Keywords: extruder; flight edge; performance efficacy; response surface; single screw

Date published: 2020-04-30