JUSTIFICATION OF THE DESIGN AND TECHNOLOGICAL SCHEME OF THE EXTRUDER FOR PROCESSING RAW MATERIALS WITH HIGH HUMIDITY

Abstract

Equipping the extruder with a vacuum chamber and realizing the advantages of the thermal vacuum effect in the operation of such a machine allows you to increase the energy efficiency of its working process by replacing part of the energy of the electric drive with the energy (heat)of hot steam released from the extrudate during intensive dewatering of the product under low pressure. To expand the scope of application of such an extruder by processing raw materials with high humidity, we propose its modernized design and technological scheme with two-stage dehydration of the extrudate after it leaves the working path of the machine. This scheme of operation of the machine allows processing raw materials with a humidity of 40-45% and obtaining extrudates with a moisture content of no more than 10-12. 5%. In this case, the humidity control of the processed raw material is carried out by blowing hot wet water vapor or hot dried water vapor through its layer (when the heating elements are turned on), and the humidity control of the finished product is carried out by changing the pressure in the vacuum chamber of the extruder using a vacuum regulator, as well as by changing the humidity of the processed raw material.